World-Wide Research and Publishing Co. National Parks Division.

• A photographic and comprehensive guide to Zion & Bryce Canyon National Parks
• A Photographic and comprehensive guide to Glacier & Waterton Lakes National Parks
• A photographic and comprehensive guide to Grand Canyon National Park
• A photographic and comprehensive guide to Grand Teton National Park
• A photographic and comprehensive guide to Rocky Mountain & Mesa Verde National Parks
• A photographic and comprehensive guide to Yellowstone National Park