United States Dept. of the Interior, Geological Survey : For sale by the Supt. of Docs., U.S. G.P.O.,
Trimble, Donald E.
Geological Survey (U.S.)
Geological Survey bulletin ; 1493
The geologic story of the Great Plains : a nontechnical description of the origin and evolution of the landscape of the Great Plains
The geologic story of the Great Plains : a nontechnical description of the origin and evolution of the landscape of the Great Plains
The geologic story of the Great Plains :