1
by Wilburn, D. R. (David R.)
Reston, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 2015
Reston, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 2015
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2
by Wilburn, D. R. (David R.)
Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, 2012
Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, 2012
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3
by Wilburn, D. R. (David R.)
[Reston, Va.] : U.S. Geological Survey, 2005
[Reston, Va.] : U.S. Geological Survey, 2005
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4
by Wilburn, D. R. (David R.)
Denver, Colo. : U.S. Dept. of the Interior, U.S. Geological Survey, 1998
Denver, Colo. : U.S. Dept. of the Interior, U.S. Geological Survey, 1998
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5
by Wilburn, D. R. (David R.)
[Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2011
[Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2011
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6
by Wilburn, D. R. (David R.)
[Reston, Va.] : U.S. Geological Survey, U.S. Dept. of the Interior, 2001
Version 1.01.
[Reston, Va.] : U.S. Geological Survey, U.S. Dept. of the Interior, 2001
Version 1.01.
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7
by Wilburn, D. R. (David R.)
Reston, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 2007
Reston, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 2007
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8
by Wilburn, D. R. (David R.)
Denver, Colo. : U.S. Dept. of the Interior, U.S. Geological Survey, 2000
Paper ed.
Denver, Colo. : U.S. Dept. of the Interior, U.S. Geological Survey, 2000
Paper ed.
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9
by Wilburn, D. R. (David R.)
Denver, Colo. : U.S. Dept. of the Interior, U.S. Geological Survey, 2000
Paper ed.
Denver, Colo. : U.S. Dept. of the Interior, U.S. Geological Survey, 2000
Paper ed.
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Book
10
by Wilburn, D. R. (David R.)
[Avondale, Md.] : U.S. Dept. of the Interior, Bureau of Mines, 1986
[Avondale, Md.] : U.S. Dept. of the Interior, Bureau of Mines, 1986
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Book
11
by Wilburn, D. R. (David R.)
Reston, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 2012
Version 1.1.
Reston, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 2012
Version 1.1.
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12
by Wilburn, D. R. (David R.)
[Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2011
[Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey, 2011
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Electronic
Book
13
by Wilburn, D. R. (David R.)
Denver, Colo. : U.S. Dept. of the Interior, U.S. Geological Survey, 2000
Paper ed.
Denver, Colo. : U.S. Dept. of the Interior, U.S. Geological Survey, 2000
Paper ed.
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14
by Wilburn, D. R. (David R.)
Denver, Colo. : U.S. Dept. of the Interior, U.S. Geological Survey, 1998
Denver, Colo. : U.S. Dept. of the Interior, U.S. Geological Survey, 1998
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15
by Wilburn, D. R. (David R.)
Denver, Colo. : U.S. Dept. of the Interior, U.S. Geological Survey, 2000
Paper ed.
Denver, Colo. : U.S. Dept. of the Interior, U.S. Geological Survey, 2000
Paper ed.
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16
by Wilburn, D. R. (David R.)
Reston, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 2012
Reston, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 2012
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17
by Wilburn, D. R. (David R.)
[Reston, Va.] : U.S. Geological Survey, U.S. Dept. of the Interior, 2001
Version 1.01.
[Reston, Va.] : U.S. Geological Survey, U.S. Dept. of the Interior, 2001
Version 1.01.
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Electronic
Book
18
by Wilburn, D. R. (David R.)
Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, 2012
Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, 2012
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19
by Wilburn, D. R. (David R.)
Reston, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 2014
Reston, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 2014
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20
by Wilburn, D. R. (David R.)
Denver, Colo. : U.S. Dept. of the Interior, U.S. Geological Survey, 1998
Denver, Colo. : U.S. Dept. of the Interior, U.S. Geological Survey, 1998
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