| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| 1970 |
|
Horizons du fantastique, #12 | EKLA | MAGAZINE | 12 |
| January 1972 |
|
Report on Planet Three and Other Speculations | Harper & Row | Nonfiction | 152 |
| 1973 |
|
Report on Planet Three and Other Speculations | Corgi Books / Transworld Publishers | Nonfiction | 160 |
| 1975 |
|
Report on Planet Three and Other Speculations | Corgi | Nonfiction | 160 |
| June 1982 |
|
Report on Planet Three and Other Speculations | Signet / New American Library | Nonfiction | 141 |
| 1984 |
|
Report on Planet Three and Other Speculations | Pan Books | Nonfiction | 160 |
| 1985 |
|
Berichte über einen kleinen blauen Planeten | Bastei Lübbe | Nonfiction | 177 |
| March 1985 | Report on Planet Three and Other Speculations | Berkley Books | Nonfiction | 150 |