| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| 1975 |
|
A Tolkien Compass | Open Court | Nonfiction | 27 |
| 1975 |
|
A Tolkien Compass | Open Court | Nonfiction | 29 |
| June 1980 |
|
A Tolkien Compass | Del Rey / Ballantine | Nonfiction | |
| February 2003 |
|
A Tolkien Compass | Open Court | Nonfiction | 27 |