Joseph Wood Krutch - The Forgotten Peninsula
Charles L. Bernheimer - Rainbow Bridge - Circling Navajo Mountain and Explorations in the Bad Lands of Southern Utah and Northern Arizona
Davis W.M. 1903 - An Excursion to the Plateau Province of Utah and Arizona
BLM - American Desert Bighorn Sheep in California
Chin Kung - The Art of Living
Edmund Carroll Jaeger - The Mountain Trees of Southern California
Alfred W.mccann - Starving America