George Cornelius Ruhle

1900

• Roads and trails of Waterton-Glacier International Peace Park
• A guide to Haleakala National Park, Island of Maui, Hawaii
• Advisory report on national parks and reserves for Taiwan, 1965
• Advisory report on national parks and reserves for the Republic of Korea, 1966
• Along Crater Lake highways
• Guide to Glacier National Park
• Hawaii National Park
• Roads and trails of Waterton-Glacier national parks