by Edwin Wallace Lohr, Garland Bayard Gott, Geological Survey (U.S.), Jack Edward Harrison, James David Vine, James Kincheon Searcy, L. E. Smith, Morris Mordecai Thompson, Richard Carlton Culler, Robert Ugstad King, Walter Scott West, William Edward Barnes Benson, Benjamin Franklin Leonard, Harold V. Peterson, Max Gregg White, Ralph Leroy Erickson

1949