| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Bound for the Backcountry II: A History of Airstrips in the Wallowas, Hells Canyon, and the Lower Salmon River | 978-O-692-3O5O6-5 (O-692-3O5O6-8) | 2015 |
H.H. · R. H. · R. H. Holm · R. Holm · Richard H. · Richard H. Holm Jr.