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3by Phelps, G. G.“...U.S. Geological Survey,...”
Published 1987
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4
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5by Phelps, G. G.“...U.S. Geological Survey,...”
Published 1990
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6by Phelps, G. G.“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
Published 1990
Government Document Book -
7by Phelps, G. G.“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
Published 1995
Government Document Book -
8by Phelps, G. G.“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
Published 1997
Government Document Book -
9by Phelps, G. G.“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
Published 1996
Government Document Book -
10by Phelps, G. G.“...U.S. Dept. of Interior, U.S. Geological Survey ;...”
Published 2004
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11by Phelps, G. G.“...U.S. Dept. of the Interior, U.S. Geological Survey,...”
Published 2001
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12by Phelps, G. G.“...U.S. Department of the Interior, U.S. Geological Survey,...”
Published 1994
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13by Phelps, G. G.“...Dept. of the Interior, U.S. Geological Survey ;...”
Published 1988
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14by Phelps, G. G.“...U.S. Dept. of the Interior, Geological Survey ;...”
Published 1987
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15by Phelps, G. G.“...U.S. Geological Survey, Water Resources Division,...”
Published 1978
Government Document Book