Rock Art of the Upper Midwest
by
Geri Schrab, Robert F. Boszhardt
Language: English
Release Date: August 24, 2016
In Hidden Thunder, renowned watercolor artist Geri Schrab and archaeologist Robert "Ernie" Boszhardt give readers an up-close-and-personal look at rock art. With an eye toward preservation, Schrab and Boszhardt take you with them as they research, document, and interpret at the ancient petroglyphs...