Direct Conversion
| First published | January 1953 |
|---|---|
| Type | Essay |
Publications (2)
| Date | Publication | Publisher | Type | Page |
|---|---|---|---|---|
| January 1953 | Amazing Stories, January 1953 | Ziff-Davis Publishing Company | MAGAZINE | 152 |
| October 1953 | Amazing Stories, #23 | Thorpe & Porter | MAGAZINE | 96 |