| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Patches and Insignia of the US Army from the Great War to the Early Cold War - Armor , Cavalry , Tank Destroyer , Constabulary | 978-O-97482O4-O-8 (O-97482O4-O-7) | 2005 |
H. Keller · K. H. · K.k. · K. Keller · Kurt Keller