| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Encyclopedia of the Modern Elongated: A complete and authentic description of all modern elongateds, 1960-1978 | 978-0-9626996-2-7 (0-9626996-2-4) | 1990 |
| Supplement to The encyclopedia of the modern elongated: A complete and authentic description of modern elongated coins, 1978-1995 | 978-0-9626996-4-1 (0-9626996-4-0) | 1998 |