The Subtlest Difference
| First published | October 1977 |
|---|---|
| Type | Essay |
| Series | Asimov's Essays: F&SF |
Publications (5)
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| October 1977 |
|
The Magazine of Fantasy and Science Fiction, October 1977 | Mercury Press, Inc. | MAGAZINE | 139 |
| 1979 |
|
The Road to Infinity | Doubleday | Nonfiction | |
| February 1981 |
|
The Road to Infinity | Discus / Avon | Nonfiction | 221 |
| August 1989 |
|
Asimov on Science: A 30 Year Retrospective | Doubleday | Nonfiction | 228 |
| November 1991 |
|
Asimov on Science: A 30 Year Retrospective | Pinnacle Books / Windsor Publishing Corp. | Nonfiction | 283 |