Yetman, David A.

David A. Yetman has documented his extensive travels and life among GuarijAA-os, Mayos and Seris and is the author of several books including The GuarijAA-os of the Sierra Madre: Hidden People of Northwestern Mexico. He is a research social scientist at the Southwest Center of the University of Arizona, as well as the host of the PBS television documentary series The Desert Speaks.