Hydrocarbon Processing - March 2022 - 55

HP Flashback
This paper provides developments by which the original
fixed-bed Houdry process was adapted to produce basestock
for aviation gasoline. Among the developments were the manufacturing
of synthetic catalyst, production of isobutane and butylene
for alkylation and catalytic treating of primary basestock.
How will the 100-octane aviation gasoline program
affect post-war motor gasoline?
B. K. Brown and D. P. Barnard, December 1943
With the return of competition in cost, processes and raw
materials, the authors of this article are of the opinion that: " As
much as 100,000 barrels of 100-octane capacity will be shut
down or diverted to other uses because of excessive operating
costs and crude utilizations. "
Bombs fall on Ploesti
March 1944
" For the Ploesti mission, every plant in each element was
given a pinpoint and had to find it. There are no secondary targets. "
This quote-said Lieutenant B. O. Lisle during the annual
meeting of the American Institute of Mining and Metallurgical
Engineers-summed up the bombing of refining centers in
Ploesti, Poland by Allied bombers. Refined fuels were crucial in
aiding the war effort on both sides. Without oil/fuels, military
operations could not be conducted.
Study of the effect of catalytic cracking
on the post-war supply of motor gasolines,
distillates and residual fuels
March 1944
Previous advances in refining technology have been slowly
adopted. Necessity for military-grade gasolines brought catalytic
cracking into refining without regard to other considerations.
With the end of fighting, catalytic cracking capacity,
the quality of its products, its ownership and its location will
suddenly become factors in what the industry has to sell.
Use of the mass spectrometer in the routine analysis
of refinery gas samples
J. G. Schaafsma, April 1944
This article provides a brief discussion on the theory and
operation of the mass spectrometer and its performance when
used to control and acid alkylation unit.
How to train plant personnel in fire prevention
and fire fighting
A. W. Trusty, May 1944
Refining personnel is changing rapidly and many new personnel
have never seen an oil fire. It is imperative that operators
be familiar with the cause and nature of fires, along with the
most efficient and quickest methods to combat them.
Influence of ozone on diesel engine performance
W. J. Armstrong and C. E. Thorp, June 1944
For several years, ozone has been suggested as an agent that
might be of value in obtaining improvement in the thermal efficiency
of internal-combustion engines. This paper describes
various experiments to determine the influence of ozone on
compression-ignition engine performance.
Chemicals from petroleum
H. D. Wilde, July 1944
The outstanding raw material used today for synthetic chemical
production, especially from a volume standpoint, is butylene.
Time-saving computing instruments
for spectroscopic analysis
T. D. Morgan and F. W. Crawford, September 1944
Chemical plants depend on rapid analytical methods as a
guide to keep the plant onstream. Successful applications of
spectroscopic methods to these analytical problems have shortened
the time interval from sampling to completion of an analysis,
saving a significant amount of workers' time.
Characteristics of the differential-type flowmeter
and conditions affecting its operation
L. K. Spink, November 1944
This work not only tells what to do and what to avoid in considering
flowmeter applications, but also cites the penalties in
terms of percent error if certain rules are not observed.
Plastics from petroleum
B. H. Weil, January 1945
This article provides a look at the many types of plastics that
are produced from petroleum oil. The article includes sections
on terminology, history, raw materials and processing routes to
produce plastics. From the article's introduction:
" Plastics today, are materials with which to conjure. Industrial
designers have depicted sleek plastic-bodied cars with
transparent plastic tops and windshields. Advertisements have
shown the home of the future as a dwelling built of plasticbonded
plywood, replete with plastic equipment from bathtub
to lighting. Newspaper accounts have dwelled upon the coming
age of plastics in which almost every article of commerce
will have plastics used in them. All this publicity has served to
focus the spotlight of attention upon materials and products
which, in appearance and use, have long been of interest and
utility to the public and industry alike. "
Fuels for high-speed diesel engines
V. A. Kalichevsky, April 1945
The original development of trucks and busses as an important
transportation factor was based on the use of gasoline
engines to supply motive power. This source of power has continued
predominantly because availability of gasoline has kept
pace with demand. However, a considerable amount of work
has been carried out, leading towards the development of diesel
engines on the basic presumption that they are less discriminating
with respect to fuels.
Super compressibility of natural gas upon compressor
performance
R. S. Ridgway, May 1945
There seems to be some tendency to ignore the effect of super
compressibility upon compressor performance and to assume
that discrepancies from this source can be neglected. It is
the aim of this paper to point out the dangers of such a practice,
to indicate the practical value of the proper treatment and to
present the methods of calculation which recognize this effect.
Hydrocarbon Processing | MARCH 2022 55

Hydrocarbon Processing - March 2022

Table of Contents for the Digital Edition of Hydrocarbon Processing - March 2022

Contents
Hydrocarbon Processing - March 2022 - Cover1
Hydrocarbon Processing - March 2022 - Cover2
Hydrocarbon Processing - March 2022 - Contents
Hydrocarbon Processing - March 2022 - 4
Hydrocarbon Processing - March 2022 - 5
Hydrocarbon Processing - March 2022 - 6
Hydrocarbon Processing - March 2022 - 7
Hydrocarbon Processing - March 2022 - 8
Hydrocarbon Processing - March 2022 - 9
Hydrocarbon Processing - March 2022 - 10
Hydrocarbon Processing - March 2022 - 11
Hydrocarbon Processing - March 2022 - 12
Hydrocarbon Processing - March 2022 - 13
Hydrocarbon Processing - March 2022 - 14
Hydrocarbon Processing - March 2022 - 15
Hydrocarbon Processing - March 2022 - 16
Hydrocarbon Processing - March 2022 - 17
Hydrocarbon Processing - March 2022 - 18
Hydrocarbon Processing - March 2022 - 19
Hydrocarbon Processing - March 2022 - 20
Hydrocarbon Processing - March 2022 - 21
Hydrocarbon Processing - March 2022 - 22
Hydrocarbon Processing - March 2022 - 23
Hydrocarbon Processing - March 2022 - 24
Hydrocarbon Processing - March 2022 - 25
Hydrocarbon Processing - March 2022 - 26
Hydrocarbon Processing - March 2022 - 27
Hydrocarbon Processing - March 2022 - 28
Hydrocarbon Processing - March 2022 - 29
Hydrocarbon Processing - March 2022 - 30
Hydrocarbon Processing - March 2022 - 31
Hydrocarbon Processing - March 2022 - 32
Hydrocarbon Processing - March 2022 - 33
Hydrocarbon Processing - March 2022 - 34
Hydrocarbon Processing - March 2022 - 35
Hydrocarbon Processing - March 2022 - 36
Hydrocarbon Processing - March 2022 - 37
Hydrocarbon Processing - March 2022 - 38
Hydrocarbon Processing - March 2022 - 39
Hydrocarbon Processing - March 2022 - 40
Hydrocarbon Processing - March 2022 - 41
Hydrocarbon Processing - March 2022 - 42
Hydrocarbon Processing - March 2022 - 43
Hydrocarbon Processing - March 2022 - 44
Hydrocarbon Processing - March 2022 - 45
Hydrocarbon Processing - March 2022 - 46
Hydrocarbon Processing - March 2022 - 47
Hydrocarbon Processing - March 2022 - 48
Hydrocarbon Processing - March 2022 - 49
Hydrocarbon Processing - March 2022 - 50
Hydrocarbon Processing - March 2022 - 51
Hydrocarbon Processing - March 2022 - 52
Hydrocarbon Processing - March 2022 - 53
Hydrocarbon Processing - March 2022 - 54
Hydrocarbon Processing - March 2022 - 55
Hydrocarbon Processing - March 2022 - 56
Hydrocarbon Processing - March 2022 - 57
Hydrocarbon Processing - March 2022 - 58
Hydrocarbon Processing - March 2022 - 59
Hydrocarbon Processing - March 2022 - 60
Hydrocarbon Processing - March 2022 - 61
Hydrocarbon Processing - March 2022 - 62
Hydrocarbon Processing - March 2022 - 63
Hydrocarbon Processing - March 2022 - 64
Hydrocarbon Processing - March 2022 - 65
Hydrocarbon Processing - March 2022 - 66
Hydrocarbon Processing - March 2022 - 67
Hydrocarbon Processing - March 2022 - 68
Hydrocarbon Processing - March 2022 - 69
Hydrocarbon Processing - March 2022 - 70
Hydrocarbon Processing - March 2022 - 71
Hydrocarbon Processing - March 2022 - 72
Hydrocarbon Processing - March 2022 - 73
Hydrocarbon Processing - March 2022 - 74
Hydrocarbon Processing - March 2022 - 75
Hydrocarbon Processing - March 2022 - 76
Hydrocarbon Processing - March 2022 - 77
Hydrocarbon Processing - March 2022 - 78
Hydrocarbon Processing - March 2022 - 79
Hydrocarbon Processing - March 2022 - 80
Hydrocarbon Processing - March 2022 - 81
Hydrocarbon Processing - March 2022 - 82
Hydrocarbon Processing - March 2022 - 83
Hydrocarbon Processing - March 2022 - 84
Hydrocarbon Processing - March 2022 - 85
Hydrocarbon Processing - March 2022 - 86
Hydrocarbon Processing - March 2022 - 87
Hydrocarbon Processing - March 2022 - 88
Hydrocarbon Processing - March 2022 - 89
Hydrocarbon Processing - March 2022 - 90
Hydrocarbon Processing - March 2022 - Cover3
Hydrocarbon Processing - March 2022 - Cover4
https://www.nxtbook.com/gulfenergyinfo/gulfpub/hpi-market-data-2024-v2
https://www.nxtbook.com/gulfenergyinfo/gulfpub/hpi-market-data-2024
https://www.nxtbook.com/gulfenergyinfo/gulfpub/gas-processes-handbook-2022_v2
https://www.nxtbook.com/gulfenergyinfo/gulfpub/gas-processes-handbook-2022
https://www.nxtbook.com/gulfenergyinfo/gulfpub/hp_202212
https://www.nxtbook.com/gulfenergyinfo/gulfpub/hpi-market-data-2023-v2
https://www.nxtbook.com/gulfenergyinfo/gulfpub/hpi-market-data-2023
https://www.nxtbook.com/gulfenergyinfo/gulfpub/hp_202211
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202210
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202209
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202208
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202207_v2
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202207
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202206_v2
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202206
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202205_v2
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202205
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202204_v2
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202204
https://www.nxtbook.com/nxtbooks/gulfpub/hp_032022
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202203
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202202
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202201
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202112
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202111
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202110
https://www.nxtbook.com/nxtbooks/gulfpub/hpimarket_2022_v2
https://www.nxtbook.com/nxtbooks/gulfpub/hpimarket_2022
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202109
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202108
https://www.nxtbook.com/nxtbooks/gulfpub/petrochemical_processes_handbook_2021_v2
https://www.nxtbook.com/nxtbooks/gulfpub/petrochemical_processes_handbook_2021
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202107
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202106
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202105
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202104
https://www.nxtbook.com/nxtbooks/gulfpub/hp_ebooks
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202103
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202102
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202101
https://www.nxtbook.com/nxtbooks/gulfpub/catalyst_handbook_2020_v2
https://www.nxtbook.com/nxtbooks/gulfpub/catalyst_handbook_2020
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202012
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202011
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202010
https://www.nxtbook.com/nxtbooks/gulfpub/hpimarket_2021
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202009
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202008
https://www.nxtbook.com/nxtbooks/gulfpub/refining_processes_handbook_2020
https://www.nxtbook.com/nxtbooks/gulfpub/refining_processes_handbook_2020_v2
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202007
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202006
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202005
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202004
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202003
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202002
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202001
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201912
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201911
https://www.nxtbook.com/nxtbooks/gulfpub/hpimarket_2020_v2
https://www.nxtbook.com/nxtbooks/gulfpub/hpimarket_2020
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201910
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201909
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201908
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201907
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201906
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201905
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201904
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201903
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201902
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201901
https://www.nxtbook.com/nxtbooks/gulfpub/petrochemical_2018_v2
https://www.nxtbook.com/nxtbooks/gulfpub/petrochemical_2018
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201812
https://www.nxtbook.com/nxtbooks/gulfpub/hpimarket_2019_v2
https://www.nxtbook.com/nxtbooks/gulfpub/hpimarket_2019
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201811
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201810
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201809
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201808
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201807
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201806
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201805
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201804
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201803
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201802
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201801
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201712
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201711
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201710
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201709
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201708
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201707
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201706
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201705
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201704
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201703
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201702
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201701
https://www.nxtbook.com/nxtbooks/gulfpub/hp_2017mediaplanner
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201612
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201611
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201610
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201609
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201608
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201607
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201606
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201605
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201604
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201603
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201602
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201601
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201512
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201511
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201510
https://www.nxtbook.com/nxtbooks/gulfpub/hp_2016mediaplanner
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201509
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201508
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201507
https://www.nxtbook.com/nxtbooks/gulfpub/hp_2015tmsd
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201506
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201505
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201504
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201503
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201502
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201501
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201412
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201411
https://www.nxtbook.com/nxtbooks/gulfpub/hp_2015mediaplanner
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201410
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201409
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201408
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201407
https://www.nxtbook.com/nxtbooks/gulfpub/hp_2014petrochemicalprocesses_v2
https://www.nxtbook.com/nxtbooks/gulfpub/hp_2014petrochemicalprocesses
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201406
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201405
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201404
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201403
https://www.nxtbook.com/nxtbooks/gulfpub/hp_2014calendar
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201402
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201401
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201312
https://www.nxtbook.com/nxtbooks/gulfpub/hp_2014mediaplanner
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201311
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201310
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201309
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201308
https://www.nxtbook.com/nxtbooks/gulfpub/hp_srsguide2013
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201307
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201306
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201305
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201304
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201303
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201302
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201301
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201212
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201211
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201210
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201209
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201208
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201207
https://www.nxtbook.com/nxtbooks/gulfpub/hp_srsguide2012
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201206
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201205
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201204
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201203
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201202
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201201
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201112
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201111
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201110
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201109
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201108
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201107_srsguide
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201107
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201106
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201105
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201104
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201103
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201102
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201101
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201012
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201011
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201010
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201009
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201008
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201007
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201006
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201005
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201004
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201003
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201002
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201001
https://www.nxtbook.com/nxtbooks/gulfpub/hp_200912
https://www.nxtbook.com/nxtbooks/gulfpub/hp_200911
https://www.nxtbook.com/nxtbooks/gulfpub/hp_200910
https://www.nxtbook.com/nxtbooks/gulfpub/hp_200909
https://www.nxtbook.com/nxtbooks/gulfpub/hp_200908
https://www.nxtbook.com/nxtbooks/gulfpub/hp_200907
https://www.nxtbook.com/nxtbooks/gulfpub/hp_200906
https://www.nxtbook.com/nxtbooks/gulfpub/hp_200905
https://www.nxtbook.com/nxtbooks/gulfpub/hp_200904
https://www.nxtbook.com/nxtbooks/gulfpub/hp_200903
https://www.nxtbook.com/nxtbooks/gulfpub/hp_200902
https://www.nxtbook.com/nxtbooks/gulfpub/hp_200901
https://www.nxtbookmedia.com