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Geologic map of the Sheridan 30' x 60' quadrangle, Sheridan, Johnson, and Campbell counties, Wyoming, and southeastern Montana
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posted on 2003-01-01, 00:00 authored by A.J. Ver Ploeg, C.S. BoydGeologic map of the Sheridan 30' x 60' quadrangle, Sheridan, Johnson, and Campbell counties, Wyoming, and southeastern Montana