| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| 1977 | UFO Trek | Sphere Books | Nonfiction | ||
| October 1979 |
|
Die Terranauten, #1: Der Erbe der Macht | Bastei | MAGAZINE | |
| 1980 |
|
Solar Wind | Perigee Paper Tiger | Nonfiction | 44 |
| 1980 |
|
Solar Wind | Paper Tiger | Nonfiction | 44 |
| November 1990 |
|
Il ciclo del grande pianeta | Fanucci Editore | Omnibus | |
| 1994 |
|
Solar Wind | Paper Tiger | Nonfiction | 44 |