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21“...Geological Survey circular ;...”
Government Document Book -
22“...Geological Survey circular ;...”
Government Document Book -
23“...Geological Survey circular ;...”
Government Document Book -
24“...Geological Survey circular ;...”
Government Document Book -
25Published 1976“...Geological Survey circular ;...”
Government Document Book -
26“...Geological Survey circular ;...”
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27by Danenberger, Elmer P.“...Geological Survey circular ;...”
Published 1976
Government Document Book -
28Published 1976“...Geological Survey circular ;...”
Government Document Book -
29by MacKevett, E. M. (Edward Malcolm), 1918-2006“...Geological Survey circular ;...”
Published 1977
Government Document Book -
30“...Geological Survey circular ;...”
Government Document Book -
31Published 1974“...Geological Survey circular ;...”
Government Document Book -
32by Taylor, James Carlton“...Geological Survey circular ;...”
Published 1976
Government Document Book -
33by Cobb, Edward H. (Edward Huntington), 1916-1983“...Geological Survey circular ;...”
Published 1976
Government Document Book -
34“...Geological Survey circular ;...”
Government Document Book -
35
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36Published 1978“...Geological Survey circular ;...”
Government Document Conference Proceeding Book -
37
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38Published 1977“...Geological Survey circular ;...”
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39
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40by Brown, C. Ervin (Clarence Ervin), 1925-“...Geological Survey circular ;...”
Published 1978
Government Document Book