| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| March 1968 |
|
The Magazine of Fantasy and Science Fiction, March 1968 | Mercury Press, Inc. | MAGAZINE | 68 |
| November 1970 |
|
Urania #553 | Mondadori | MAGAZINE | 158 |
| November 1970 |
|
Urania #554 | Mondadori | MAGAZINE | 158 |
| 1983 |
|
The Fringe of the Unknown | Prometheus Books | Nonfiction | 61 |
| 1983 |
|
The Fringe of the Unknown | Prometheus Books | Nonfiction | 61 |