The author discusses how sports would be different outside terrestrial conditions.
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| September 1965 |
|
Voices from the Sky: Previews of the Coming Space Age | Harper & Row | Nonfiction | 108 |
| 1966 |
|
Voices from the Sky: Previews of the Coming Space Age | Gollancz | Nonfiction | 108 |
| October 1967 |
|
Voices from the Sky: Previews of the Coming Space Age | Pyramid Books | Nonfiction | 96 |
| 1969 |
|
Voices from the Sky | Mayflower | Nonfiction | 94 |
| 1969 |
|
Voices from the Sky | Mayflower | Nonfiction | 94 |
| January 1971 |
|
Voices from the Sky: Previews of the Coming Space Age | Pyramid Books | Nonfiction | 96 |
| February 1980 |
|
Voices from the Sky | Pocket Books | Nonfiction | 112 |
| 1999 |
|
Greetings, Carbon-Based Bipeds!: A Vision of the 20th Century As It Happened | Voyager | Nonfiction | 240 |
| August 1999 |
|
Greetings, Carbon-Based Bipeds!: Collected Essays 1934-1998 | St. Martin's Press | Nonfiction | 240 |