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Courtesy of Escondido Public Library, Pioneer Room
http://www.oac.cdlib.org/ark:/13030/kt209nd9sw/?order=1
Title:
Calcite Mine Area sign in Anza Borrego Desert State Park, San Diego County, CA
Creator/Contributor:
Eloise Perkins
Perkins, Eloise
Date:
undated: circa 1970s
Contributing Institution:
Escondido Public Library, Pioneer Room