With God in the Yellowstone

Camping & Tramping with Roosevelt

A Summer's Outing, and The Old Man's Story

Another Summer: The Yellowstone Park and Alaska

To Geyserland Union Pacific-Oregon Short Line Railroads to the Yellowstone National Park

The Yellowstone National Park: Historical and Descriptive

Wonders of the Yellowstone

Ferdinand Vandiveer Hayden and the Founding of the Yellowstone National Park

Het Yellowstone-Park

Our National Parks

The Two Great Canyons: Excerpts From Letters Written on a Western Journey