1.
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[Reston, Va.?] : U.S. Dept. of the Interior, Geological Survey ; Alexandria, VA : For sale by the Branch of Distribution, USGS, 1984.
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2.
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Washington : U.S. Govt. Print. Off., 1982.
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3.
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Urbana, Illinois State Geological Survey, 1971.
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4.
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Ithaca, N.Y., Paleontological Research Institution, 1963.
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5.
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6.
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Washington : U.S. G.P.O. ; Alexandria, VA : For sale by the Distribution Branch, U.S. Geological Survey, 1982.
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7.
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Washington, D.C. : R.H. Darby, 1893.
QE801 .C767 1893 |
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8.
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Washington : U.S. Govt. Print. Off., 1982.
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9.
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Washington, U.S. Govt. Print. Off., 1973.
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