Bahai Pub · Various small imprints
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Cowries and Their Relatives of Southern Africa | 978-0-908420-89-6 (0-908420-89-7) | 2000 |
| Cowries and Their Relatives of Southern Africa | 978-0-620-13107-0 (0-620-13107-1) | 1989 |