Correlation of Geologic Formations Between East-central Colorado, Central Wyoming and Southern Montana

The Geologic Story of the Rocky Mountain National Park, Colorado

Coal Fields of Grand Mesa and the West Elk Mountains, Colorado

Underground Waters of Salt River Valley, Arizona: Issues 136-143

Stories in Stone: Telling of Some of the Wonderlands of Western America and Some of the Curious Incidents in the History of Geology

Stories in Stone: Telling of Some of the Wonderlands of Western America and Some of the Curious Incidents in the History of Geology

The Face of the Earth as Seen from the Air: A Study in the Application of Airplane Photography to Geography

The Face of the Earth as Seen from the Air: A Study in the Application of Airplane Photography to Geography, Volume 4

The Face of the Earth as Seen from the Air: A Study in the Application of Airplane Photography to Geography

The Face of the Earth as Seen from the Air: A Study in the Application of Airplane Photography to Geography

The Geologic Story of the Rocky Mountain National Park, Colorado

Stories in Stone: Telling of Some of the Wonderlands of Western America and Some of the Curious Incidents in the History of Geology

Stratigraphy of the Coal Fields of Northern Central New Mexico

The Face of the Earth as Seen from the Air: A Study in the Application of Airplane Photography to Geography

The Geologic Story of the Rocky Mountain National Park, Colorado

The Face of the Earth as Seen from the Air: A Study in the Application of Airplane Photography to Geography

Coal Resources of the Raton Coal Field, Colfax County, New Mexico: Issues 751-752

Geology and Paleontology of the Raton Mesa and Other Regions in Colorado and New Mexico: Issue 1

Stories in Stone: Telling of Some of the Wonderlands of Western America and Some of the Curious Incidents in the History of Geology

The Geologic Story of the Rocky Mountain National Park, Colorado