10 books • 3 series
Natural Landmarks of Arizona (Southwest Center)
The Saguaro Cactus (Southwest Center)
Conflict in Colonial Sonora
The Great Cacti
The Organ Pipe Cactus
The Guarijios of the Sierra Madre
Mayo Ethnobotany
Scattered round Stones (University of Arizona Southwest Center)
Sonora (University of Arizona Southwest Centre)
Where the Desert Meets the Sea