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Lewis and Clark and the Geology of the Great Plains
by Diffendal, Robert F., Jr., ...
ISBN: 9781561610044
List Price: $20.00
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Lewis and Clark and the Geology of Nebraska and Parts of Adjacent States
by Diffendal, Robert F., Jr., ...
ISBN: 9781561610051
List Price: $15.00
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Geologic Map of the O'Neill 1 x 2 Quadrangle, Nebraska, with Configuration Maps of Surfaces ...
by Diffendal, Robert F., Jr., ...
ISBN: 9781561610105