| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| 1973 |
|
Planets and Dimensions | Mirage Press | Nonfiction | 12 |
| 1973 |
|
Planets and Dimensions | Mirage Press | Nonfiction | 12 |
| 2017 |
|
Dawnward Spire, Lonely Hill: The Letters of H. P. Lovecraft and Clark Ashton Smith | Hippocampus Press | Nonfiction | 672 |