P.G. · P. Gregory · Patrick J. Gregory
British Columbia · Osprey Publishing
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Amphibians & Reptiles of British Columbia | 978-0-7726-5448-9 (0-7726-5448-4) | 2006 | Brent Matsuda · David Green |
| Pershing's Lieutenants: American Military Leadership in World War I | 978-1-4728-3863-6 (1-4728-3863-7) | 2020 | David T. Zabecki · Douglas V. Mastriano · William H. Van Husen · Holt D. Theis · Jerry D. Morelock · Mark Jackson · James S. Corum |