| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| On the Edge of Splendor: Exploring Grand Canyon's Human Past | 978-O-933452-3O-5 (O-933452-3O-6) | 1989 |
D S · D. Schwartz · D.W. · D W Schwartz · Douglas Schwartz · Douglas W. · Douglas Wright Schwartz · W.S. · W. Schwartz