Originally published in The Saturday Review of Literature, 26 November, 1955
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| June 1956 |
|
The Magazine of Fantasy and Science Fiction, June 1956 | Fantasy House, Inc. | MAGAZINE | 39 |
| 1957 |
|
Ciencia y fantasía, Numero 4 | Novaro | MAGAZINE | 42 |
| 1959 | The Challenge of the Spaceship: Previews of Tomorrow's World | Harper & Brothers | Nonfiction | ||
| 1960 |
|
Über den Himmel hinaus: Unser Leben im Zeichen der Raumfahrt | Econ | Nonfiction | 75 |
| 1960 |
|
The Challenge of the Spaceship: Previews of Tomorrow's World | Frederick Muller Ltd | Nonfiction | |
| 1961 |
|
The Challenge of the Spaceship | Ballantine Books | Nonfiction | 54 |
| January 1972 |
|
Report on Planet Three and Other Speculations | Harper & Row | Nonfiction | 82 |
| 1973 |
|
Report on Planet Three and Other Speculations | Corgi Books / Transworld Publishers | Nonfiction | 89 |
| 1975 |
|
Report on Planet Three and Other Speculations | Corgi | Nonfiction | 89 |
| June 1980 |
|
The Challenge of the Spaceship | Pocket Books | Nonfiction | 66 |
| June 1982 |
|
Report on Planet Three and Other Speculations | Signet / New American Library | Nonfiction | 79 |
| 1984 |
|
Report on Planet Three and Other Speculations | Pan Books | Nonfiction | 89 |
| 1985 |
|
Berichte über einen kleinen blauen Planeten | Bastei Lübbe | Nonfiction | 95 |
| March 1985 | Report on Planet Three and Other Speculations | Berkley Books | Nonfiction | 80 |