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61by Lovering, T. G. (Tom Gray), 1921-1996“...Geological Survey bulletin ;...”
Published 1980
Government Document Book -
62
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63
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64by Reed, John Calvin, Jr., 1930-“...Geological Survey bulletin ;...”
Published 1980
Government Document Book -
65by Pierson, Charles Thomas, 1918-“...Geological Survey bulletin ;...”
Published 1980
Government Document Book -
66by Schmidt, Robert Gordon, 1924-“...Geological Survey bulletin ;...”
Published 1980
Government Document Book -
67Published 1979“...Geological Survey bulletin ;...”
Government Document Book -
68by Walker, George Walton, 1921-“...Geological Survey bulletin ;...”
Published 1979
Government Document Book -
69
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70
Government Document Book -
71by Evans, James George, 1938-“...Geological Survey bulletin ;...”
Published 1980
Government Document Book -
72by Crandell, Dwight R. (Dwight Raymond), 1923-2009“...Geological Survey bulletin ;...”
Published 1980
Government Document Book -
73
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74
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75
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76by Kepferle, Roy Clark, 1926-“...Geological Survey bulletin ;...”
Published 1981
Government Document Book -
77by Snyder, John Parr, 1926-“...Geological Survey bulletin ;...”
Published 1981
Government Document Book -
78
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79by Lohman, S. W. (Stanley William), 1907-1992“...Geological Survey bulletin ;...”
Published 1981
Government Document Book -
80by Hayes, Philip T. (Philip Thayer), 1923-“...Geological Survey bulletin ;...”
Published 1982
Government Document Book