C. G. · C. W. · W G · W. Guthrie
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| All Aboard! for Glacier: The Great Northern Railway and Glacier National Park | 978-1-56037-276-9 (1-56037-276-1) | 2004 |
| Glacier National Park, The First 100 Years | 978-1-56037-336-0 (1-56037-336-9) | 2008 |
| Going-to-the-Sun Road: Glacier National Park's Highway to the Sky | 978-1-56037-335-3 (1-56037-335-0) | 2006 |