| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| The Special & Commemorative Postmarks, Cachets & Covers of South Africa, 1892-1975. | 978-0-620-01859-3 (0-620-01859-3) | 1975 |
| The special and commemorative postmarks, cachets, and covers of South Africa, 1892-1975 | 978-0-620-03202-5 (0-620-03202-2) | 1978 |