HCOB THIRTY MARCH, HCOB 30 MARCH

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short for HCOB 30 March 72, PRIMARY CORRECTION RUNDOWN, FIRST CRAMMING CORRECTION. This is now issued as HCOB 30 March 72 Revised, THE PRIMARY CORRECTION RUNDOWN REVISED. —ExDn Lectures Approved Glossary: Expanded Dianetics (30 March 1972)