R.N. · R. Noel · R. S. · [s.n.]
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| The Languages of Tolkien's Middle-Earth | 978-0-395-29129-0 (0-395-29129-1) | 1980 |
| The Languages of Tolkien's Middle-Earth: A Complete Guide to All Fourteen of the Languages Tolkien Invented | 978-0-395-29130-6 (0-395-29130-5) | 1980 |
| The Mythology of Middle-Earth | 978-0-395-25006-8 (0-395-25006-4) | 1977 |