United States National Park Service

Castillo De San Marcos

Shenandoah National Park, Virginia

Grand Teton

Agate Fossil Beds National Monument, Nebraska

Agate Fossil Beds National Monument, Nebraska

Devils Tower National Monument, Wyoming

Charlestown Navy Yard

Devils Tower National Monument, Wyoming

Grand Teton

Charlestown Navy Yard

Yosemite National Park, California

Great Smoky Mountains National Park

Great Smoky Mountains National Park

Fort Sumter

John Brown's Raid

At Home In The Smokies

At Home In The Smokies

John Brown's Raid

Crater Lake National Park, Oregon (1958)

Castillo De San Marcos

The Forests Of Mount Rainier National Park

Fort Jefferson National Monument, Florida

Navajo National Monument

Tonto Cliff Dwellings Guide

Bryce Canyon National Park, Utah

Manassas (Bull Run) National Battlefield Park

Spruce Tree House Trail Guide

Zion National Park, Utah

Tumacacori National Monument, Arizona

Wupatki National Monument, Arizona

Rainbow Bridge National Monument

Rifles And Riflemen At The Battle Of Kings Mountain

Devils Tower National Monument

Grand Teton National Park, Wyoming

Point Park, Lookout Mountain And Chattanooga Battlefields

Montezuma Castle National Monument, Arizona

Blue Ridge Parkway, Virginia And North Carolina

Chiricahua National Monument

Petrified Forest National Monument

Crater Lake National Park, Oregon

Lee Mansion National Memorial

Pipestone National Monument

Redwood: A Guide To Redwood National And State Parks, California (Handbook (United States. National Park Service. Division Of Publications), 154.)

2018 National Park Journal Yellowstone Edition

Superintendent's Monthly Report: July 1950 (Classic Reprint)