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Collection: Walter E. Heinrichs, Jr. |
Place Keywords: United States, Arizona, Pima County, Twin Buttes - 7.5 Min, Twin Buttes Open Pit, T18S R13E Sec 5 C, Sierrita Mts. physiographic area, Pima metallic mineral dist., Pima246
Collection: Walter E. Heinrichs, Jr. |
Place Keywords: United States, Arizona, Pima County, Twin Buttes - 7.5 Min, Twin Buttes Open Pit, T18S R13E Sec 5 C, Sierrita Mts. physiographic area, Pima metallic mineral dist., Pima246