Letter (Astounding/Analog, September 1960)
| First published | September 1960 |
|---|---|
| Type | Essay |
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| September 1960 |
|
Astounding/Analog Science Fact & Fiction, September 1960 | Street & Smith Publications, Inc. | MAGAZINE | 156|156.1 |
| January 1961 |
|
Astounding/Analog Science Fact & Fiction, January 1961 | Atlas Publishing and Distribution Co. Ltd | MAGAZINE | 122|122.1 |