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Courtesy of UC Riverside, California Museum of Photography
http://www.oac.cdlib.org/ark:/13030/kt7b69p8km/?order=1
Title:
A long-buried chapter in the take of the ages - petrified forests. Arizona. U.S.
Creator/Contributor:
Not Known
Gifford M. Mast
Date:
[Date not indicated]
Contributing Institution:
UC Riverside, California Museum of Photography