| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| 1976 |
|
The Last Celt: A Bio-Bibliography of Robert Ervin Howard | Donald M. Grant | Nonfiction | 31 |
| November 1977 |
|
The Last Celt: A Bio-Bibliography of Robert Ervin Howard | Berkley Windhover | Nonfiction | 31 |
| August 2003 |
|
The Howard Reader, #8 August 2003 | Joe & Mona Marek | FANZINE | 32 |
| July 2019 |
|
Post Oaks and Sand Roughs & Other Autobiographical Writings | The Robert E. Howard Foundation Press | Collection | 25 |