Betsy A. Weld, Charles Richard Murray, E. R. German, Frank T. Manheim, Fred Pessl, Frederic Hone Nichols, Geological Survey (U.S.), James Richard Anderson, Marjorie C. Mullens, Westley Farnsworth Curtis, William Edward Davies, Alfred L. Knight, E. Bodette Reeves, Ernest E. Hardy, J. K. Culbertson, James F. Bailey, Kathleen T. Iseri, William H. Langer, Donovan Kelly, E. B. Chase, John T. Roach, Marvin L. Millgate, Robert B. Ryder · 1949