Preliminary digital surficial geologic map of the Newcastle 30' x 60' quadrangle, Weston and Niobrara counties, Wyoming and western South Dakota
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posted on 01.01.2000, 00:00 authored by L.L. Hallberg, J.C. CasePreliminary digital surficial geologic map of the Newcastle 30' x 60' quadrangle, Weston and Niobrara counties, Wyoming and western South Dakota