Geologic map of the Arivaca quadrangle and vicinity, Pima and Santa Cruz counties, Arizona
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Miscellaneous Field Studies Map↗
Geology topics
H.D. Drewes
Publications and source records attributed to H.D. Drewes.
Geologic map of the Portal Quadrangle and vicinity, Cochise County, Southeast Arizona
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IMAP↗
Geologic map and structure sections of the Sierra Juarez, Chihuahua, Mexico
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IMAP↗