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PDF 100.8M

"Geologic Atlas of the United States, Bradshaw Mountains Folio No. 126, Arizona"

Department of the Interior, United States Geological Survey, 1905


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PDF 1.5M

"The Mineralogy of Arizona" by F.N. Guild, 1910

"The object of this publication is to give a fairly complete description of Arizona's minerals with some reference to their mode of occurrence, associations and chemical composition.