United States National Park Service – författare

National Parks Portfolio

National Parks Portfolio

Interpretation

Interpretation

Restoration of Ford's Theatre, Washington D.C.

Early History Of Glacier National Park, Montana

Early History Of Glacier National Park, Montana

Stehekin

A Wilderness Journey Into the Northern Cascades

Annual Report of the Director of the National Park Service to the Secretary of the Interior

Wild Animals of Glacier National Park

The Mammals, With Notes On Physiography and Life Zones

Yosemite Nature Notes no.1; Volume 26

Wild Animals of Glacier National Park

The Mammals, With Notes On Physiography and Life Zones

Yosemite Nature Notes no.1; Volume 26

Fort Jefferson National Monument, Florida

Yosemite National Park, California

Tonto Cliff Dwellings Guide

Tumacacori National Monument, Arizona

Chiricahua National Monument

Montezuma Castle National Monument, Arizona

Petrified Forest National Monument

Devils Tower National Monument

Navajo National Monument

Shenandoah National Park, Virginia

Rainbow Bridge National Monument

Blue Ridge Parkway, Virginia and North Carolina

Zion National Park, Utah

Grand Teton National Park, Wyoming

Bryce Canyon National Park, Utah

Charlestown Navy Yard