| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| 1975 |
|
The Gemini Problem: A Study in Darkover | T-K Graphics | Nonfiction |
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| 1975 |
|
The Gemini Problem: A Study in Darkover | T-K Graphics | Nonfiction |