1.
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Washington, DC : U.S. G.P.O. : Denver, CO ; For sale by the Books and Open-File Reports Section, U.S. Geological Survey, 1992.
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2.
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Urbana, Ill. : Illinois State Geological Survey, 1970.
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3.
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Urbana, Ill. : Illinois State Geological Survey, 1969.
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4.
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Champaign, Ill. : Illinois State Geological Survey, 2001.
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5.
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Menlo Park, CA : U.S. Geological Survey ; [Denver, Colo. : Books and Open-File Reports Section, distributor, 1992]
I 19.76: 92-407 |
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6.
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[Washington, D.C.?] : U.S. G.P.O. ; Denver, CO : For sale by U.S. Geological Survey, Information Services, 1995.
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