Scientology Chronology - April 1964
| April 1, 1964 | New Mimeo Line, HCO Executive Letter | |
| April 1, 1964 | Saint Hill Personnel | |
| April 2, 1964 | Two Types of People | |
| April 2, 1964 | Saint Hill Enrollment, Materials, Courses, and Use of Class VI Processes | |
| April 2, 1964 | To the Saint Hill Student: Instruction Targets | |
| April 2, 1964 | Use of Recreation Facilities, 1964 | |
| April 7, 1964 | Q and A | |
| April 10, 1964 | How to Manage a Course | |
| April 10, 1964 | Auditing Skills | |
| April 10, 1964 | Balancing Income Outgo, Paper, Postage and Printing | |
| April 10, 1964 | Domestic Staff | |
| April 10, 1964 | Scientology Courses | |
| April 13, 1964 | Glossary of Terms | |
| April 13, 1964 | Tone Arm Action | |
| April 14, 1964 | The Classification and Gradation Program | |
| April 16, 1964 | Auditing by Lists | |
| April 21, 1964 | Problems and Solutions | |
| April 28, 1964 | Wisdom as an Auditor | |
| April 30, 1964 | Effectiveness of Processing | |
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