One Day in the Cretaceous
L. Sprague de Camp & Catherine Crook de Camp
| First published | June 1981 |
|---|---|
| Type | Essay |
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| June 1981 |
|
Footprints on Sand | Advent: Publishers | Collection | 51 |
| June 1981 |
|
Footprints on Sand | Advent: Publishers | Collection | 51 |
| February 2021 |
|
Footprints on Sand | Advent:Publishers / ReAnimus Press | Collection | |51 |