| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| GERMAN CONCENTRATION CAMPS 1933-1945 VOLUME II PRISONER MAIL | 978-82-995588-2-2 (82-995588-2-4) | 2000 |
| Norwegeian Officers in German Captivity 1940-1945 and their Prisoner Mail | 978-82-995588-6-0 (82-995588-6-7) | 2004 |