Frank Edward Byrne, Fred Forrest Lawrence, Geological Survey (U.S.). Champaign District, Geological Survey (U.S.). Water Resources Division. Austin District, Geological Survey (U.S.). Water Resources Division. Tacoma District, Gerald Arthur FitzGerald, Guy Clarke Stevens, Guy Earl Harbeck, Harold Coble Troxell, Jack Bennett Graham, John G. Connor, Walter Basil Langbein, Clayton Haines Hardison, Wendell B. Johnson, Denzil W. Bergman · 1949