Geological Survey (U.S.) 87
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Rabbitt, Mary C. 28
Ayvazoglou, W. 1871-1956 22
Skitsky, V. L. 17
Vesselowsky, S. T. 1885-1962 17
Geological Survey (U.S.), 12
Clarke, James W. 9
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National Institute of Education (U.S.) 6
American Bibliographical Center 5
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National Institute of Standards and Technology (U.S.) 4
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United States. Bureau of Mines 4
United States. Department of Education 4
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American Psychological Association 3
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Air Pollution Technical Information Center 1
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American Economic Association 1
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American Society of Mechanical Engineers. Winter Annual Meeting (1985 : Miami Beach, Fla.) 1
Ansell, G. B. 1
Apogee Research, Inc 1
Arctic Marine Transportation Integrated Action Team (U.S.), 1
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Artemis Technologies, Inc 1
Asher, Steven R. 1
Asmann-Finch, Chris 1
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Beyer, W. Nelson 1
Birgersson, M. 1
Boehm, Eric H., 1918- 1
Bott, C. J. 1947- 1
Boyce, Joseph 1