- Charles Franklin Keech, Donald J. Miller, Edward Peck Kaiser, Elizabeth B. Jaffe, Geological Survey (U.S.). Water Resources Division. Boston District, Geological Survey (U.S.). Water Resources Division. Oklahoma City District, Geological Survey (U.S.). Water Resources Division. Salt Lake City District, Geological Survey (U.S.). Water Resources Division. Tucson District, Mortimer Hay Staatz, Victor Thomas Allen, Herman L. Bauer
· 1949
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Anna Jesperson, Donald Marvin Brown, Farrell Francis Barnes, Francis John Pettijohn, Geological Survey (U.S.). Water Resources Division, Geological Survey (U.S.). Water Resources Division. Oklahoma City District, Geological Survey (U.S.). Water Resources Division. Salt Lake City District, Geological Survey (U.S.). Water Resources Division. San Francisco District, Geological Survey (U.S.). Water Resources Division. Tucson District, Gilbert H. Espenshade, Horace Maxson Babcock, Israel Gregory Sohn, Maxwell McMichael Knechtel, Mortimer Hay Staatz, R. W. Carter, Raymond Melvin Thompson, Victor Thomas Allen, William Stephens Twenhofel, Carl Huntington Broedel, Donald M. Ford, Herman Louis Bauer, Lois Emily Randall, Sam Hunting Patterson, Stephen Marion Herrick, Vincent L. White, Robert E. Spratt· 1951
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Frank Edward Byrne, Geological Survey (U.S.), Geological Survey (U.S.). Water Resources Division. Atlanta District, Geological Survey (U.S.). Water Resources Division. Austin District, Geological Survey (U.S.). Water Resources Division. Oklahoma City District, Geological Survey (U.S.). Water Resources Division. Portland District, Geological Survey (U.S.). Water Resources Division. Salt Lake City District, Geological Survey (U.S.). Water Resources Division. St. Paul District, Geological Survey (U.S.). Water Resources Division. Tacoma District, John Xavier Combo, Robert Thomas Littleton, Rollin E. Stevens, Roy Edwin Oltman, Ruth A. Atherton, Stanley E. Good, Walter Basil Langbein, Hubert William Lakin· 1949