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41
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42Published 1976“...Geological Survey circular ;...”
Government Document Conference Proceeding Book -
43Published 1977“...Geological Survey circular ;...”
Government Document Conference Proceeding Book -
44by Bergquist, Wenonah E.“...Geological Survey circular ;...”
Published 1978
Government Document Book -
45by Johnson, Kathleen M.“...Geological Survey circular ;...”
Published 1978
Government Document Book -
46
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47Published 1978“...Geological Survey circular ;...”
Government Document Book -
48by Williams, Garnett P.“...Geological Survey circular ;...”
Published 1977
Government Document Book -
49Published 1978“...Geological Survey circular ;...”
Government Document Book -
50Published 1978“...Geological Survey circular ;...”
Government Document Book -
51Published 1979“...Geological Survey circular ;...”
Government Document Book -
52by Marcus, Linda Graves“...Geological Survey circular ;...”
Published 1979
Government Document Book -
53
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54Published 1979“...Geological Survey circular ;...”
Government Document Book -
55Published 1979“...Geological Survey circular ;...”
Government Document Book -
56Published 1979“...Geological Survey circular ;...”
Government Document Book -
57by Carter, William Douglas, 1926-“...Geological Survey circular ;...”
Published 1979
Government Document Book -
58Published 1979“...Geological Survey circular ;...”
Government Document Book -
59by Hedlund, David Carl, 1924-“...Geological Survey circular ;...”
Published 1979
Government Document Book -
60