1973

Returning to the Apollo from several months spent in New York City doing sociological studies, Mr. Hubbard carried out research in the areas of vitamins and nutrition. His discoveries during this time formed the foundation for major advances he would make in later years in handling the effects of drugs and other toxic substances.

Issues
HCOB 4 Jan	Confront Study Series 9
HCOB 20 Jan RE Rev. 19 Apr 90	The Red Tag Line C/S Series 86RE
HCOB 30 Jan RE Rev. 16 May 84	Method 9 Word Clearing the Right Way Word Clearing Series 46RE
HCO PL 7 Feb II	Mimeo Supply Conservation
HCO PL 7 Feb III	Mimeo File Folders and Files
HCO PL 7 Feb R IV Rev. 22 Mar 73	Mimeo Files
HCOB 5 Apr	Axiom 28 Amended
HCO PL 12 May RC I Rev. 7 May 84	Post Protection, LRH Communicators LRH Comm N/W Series 15
HCO PL 25 May	Supplementary Evaluations Data Series 27
HCOB 11 Jul RB Rev. 21 Sep 78	Assist Summary
HCOB 29 Jul	Art, More About Art Series 2
HCOB 30 Jul	Scientology, Current State of the Subject and Materials
HCOB 2 Aug	Pep
HCO PL 7 Aug R I Rev. 2 Jan 91	Flag Representative, Purpose, Duties and Statistic
HCOB 10 Aug	PTS Handling
HCO PL 15 Aug R Rev. 2 Jan 91	Flag Representative, Orders To
HCO PL 24 Aug R Rev. 2 Jan 91	Communication, Stopping Of
HCO PL 27 Aug	Tech and LRH Comms LRH Comm N/W Series 13
HCO PL 28 Aug RA Rev. 7 May 84	The Mission of the LRH Comm Network LRH Comm N/W Series 14
HCO PL 1 Sep	Admin Know-How No. 30
HCO PL 11 Sep R Rev. 21 Sep 81	Codes and Coding, Correct Practice Policy
HCO PL 19 Sep R I Rev. 22 Jun 75	Checking Evals Data Series 28R
HCO PL 19 Sep-1	Checking Evaluations Addition Data Series 28R-1
HCO PL 19 Sep-2	Multiple Sit Eval Format Data Series 28R-2
HCO PL 20 Sep R Rev. 12 Feb 91	Concerning Administration
HCO PL 24 Sep RA Rev. 25 Jan 91	All Auditors-Ministers, Ministerial Board of Review
HCO PL 30 Sep I	Outpoints, More Data Series 29
HCO PL 30 Sep II	Situation Finding Data Series 30
HCO PL 15 Oct	Administrative Skill AKH Series 31
HCOB 15 Oct RC Rev. 26 Jul 86	Nulling and F/Ning Prepared Lists C/S Series 87RC
HCOB 19 Oct	Mistakes and PTSness
HCO PL 21 Oct RA Rev. 9 Nov 83	Case Supervisor Statistic
HCOB 21 Oct R Rev. 9 Apr 91	The South African Rundown
HCO PL 26 Oct	Staff Corrective Actions, Requiring Auditing Actions
HCO PL 28 Oct	Celebrity Centre Purpose
HCO PL 4 Nov	Publishing Policy, Books and Magazines
HCO PL 5 Nov	Source Acknowledgment
HCOB 11 Nov	Preclear Declare? Procedure
HCOB 15 Nov RA Rev. 23 Apr 91	Fear of People List
HCOB 16 Nov	Study Tech and Post Word Clearing Series 49
HCO PL 19 Nov RA Rev. 21 Jan 91	Organization Executive Course Checksheets
HCOB 20 Nov I	Anti-Q and A Drill
HCOB 20 Nov II	F/N What You Ask or Program C/S Series 89
HCOB 21 Nov	The Cure of Q and A, Man's Deadliest Disease
HCO PL 21 Nov	LRH Comm Drills
HCO PL 22 Nov	Esto Series 30
HCOB 23 Nov RB Rev. 25 May 80	Dry and Wet Hands Make False TA
HCOB 24 Nov RF I Rev. 26 Jul 86	Hi-Lo TA Assessment C/S C/S Series 53RM LF (Long Form)
HCOB 24 Nov RE II Rev. 26 Jul 86	Short Hi-Lo TA Assessment C/S C/S Series 53RM SF (Short Form)
HCO PL 25 Nov I	Final Targets Data Series 31
HCO PL 25 Nov-1	Final Target Attachment Data Series 31 Addition
Organization Executive Course Volumes 0-7 by L. Ron Hubbard	Compiled by staff between 1969 and 1972 and published for Scientology staff use, these volumes of HCO Policy Letters were first made broadly available in 1973. Published by the American Saint Hill Organization, Los Angeles, California. Revised in 1991.
Issues
HCOB 5 Dec	The Reason for Q and A
HCO PL 5 Dec R Rev. 12 Dec 74	Q and A Checksheet, Checksheet of the Hubbard Causative Leadership Course AKH Series 32R
HCOB 6 Dec	The Primary Failure C/S Series 90
HCO PL 14 Dec	Target Troubles Data Series 32
HCOB 15 Dec	The Continuous Missed W/H and Continuous Overt with Data on Degraded Beings and False PTS Conditions
L. Ron Hubbard's Professional Auditor's Bulletins	(collections of bulletins issued as books)
	L. Ron Hubbard's PABs -- Volume 1 PABs 1-24, May 53-Apr 54
	L. Ron Hubbard's PABs -- Volume 2 PABs 25-49, Apr 54-Apr 55
	L. Ron Hubbard's PABs -- Volume 3 PABs 50-74, Apr 55-Mar 56
	L. Ron Hubbard's PABs -- Volume 4 PABs 75-99, Mar 56-Nov 56
	L. Ron Hubbard's PABs -- Volume 5 PABs 100-124, Nov 56-Nov 57
	L. Ron Hubbard's PABs -- Volume 6 PABs 125-160, Dec 57-May 59
	(Note: The Professional Auditor's Bulletins written by L. Ron Hubbard are also available in the Technical Bulletins volumes.)