HCO Technical Bulletin
| September 12, 1956 | The Summary of a Bulletin from the Academy in Washington, DC Concerning Training | L. Ron Hubbard writes HCOTB 'The Summary of a Bulletin from the Academy in Washington, DC Concerning Training '. | |
| February 6, 1957 | Procedure CCH | L. Ron Hubbard writes HCOTB 'Procedure CCH'. | |
| May 17, 1957 | Definitions | L. Ron Hubbard writes HCOTB 'Definitions'. | |
| May 17, 1957 | Student Processing | L. Ron Hubbard writes HCOTB 'Student Processing'. | |
| May 20, 1957 | Interim Process | L. Ron Hubbard writes HCOTB 'Interim Process'. | |
| July 15, 1957 | Our First Lesson in Training... | L. Ron Hubbard writes HCOTB '"Our First Lesson in Training..."'. | |
| July 17, 1957 | Changes in Training Drills | L. Ron Hubbard writes HCO TB 'Changes in Training Drills'. | |
| September 3, 1957 | HPA/HCA Course Processes | L. Ron Hubbard writes HCO TB 'HPA/HCA Course Processes'. | |
| September 4, 1957 | Stable Data for Instructors | L. Ron Hubbard writes HCO TB 'Stable Data for Instructors'. | |
| September 24, 1957 | Curriculum of CCH Class | L. Ron Hubbard writes HCO TB 'Curriculum of CCH Class'. | |
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