First published as part of the book 'The Day of the Dinosaur' by L. Sprague de Camp and Catherine Crook de Camp, Doubleday, 1968.
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| 1983 |
|
The Fringe of the Unknown | Prometheus Books | Nonfiction | 133 |
| 1983 |
|
The Fringe of the Unknown | Prometheus Books | Nonfiction | 133 |