How Long to Doomsday?
| First published | June 1974 |
|---|---|
| Type | Essay |
| Series | A Step Farther Out |
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| June 1974 |
|
Galaxy, June 1974 | UPD Publishing Corporation | MAGAZINE | 110 |
| June 1974 |
|
Galaxy Science Fiction Magazine, June 1974 | Universal-Tandem Publishing Company Ltd. | MAGAZINE | 110 |
| November 1977 |
|
That Buck Rogers Stuff | Extequer Press | Nonfiction | 21 |