The Map That Changed the World: William Smith and the Birth of Modern Geology [UNABRIDGED]

Geology Underfoot in Death Valley and Owens Valley

Roadside Geology of Northern California (Roadside Geology Series)

Roadside Geology of the Yellowstone Country (Roadside Geology Series)

Roadside Geology of Montana (Roadside Geology Series)

Yellowstone Trails: A Hiking Guide

Florida Hiking Trails: Official Guide to the Florida Trail on Public Land

Hiking Through Colorado History

Watercolor Painting on the Trail : A Hiking Artist's Handbook

Hiking Rocky Mountain National Park: Including Indian Peaks