1.
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2.
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3.
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QC981.8.C5 G663 1993 |
Map It |
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4.
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5.
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6.
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Boulder, Colo. : Geological Society of America, 1987.
QE71 .G48 1986 vol. K-3 |
Map It |
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7.
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Minneapolis : University of Minnesota Press, c1992.
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