by N. R. Ellis, Charles William Rees, Edwin Richard Kalmbach, Enoch Wesley Nelson, Fenner Satterthwaite Stickney, Foster Hendrickson Benjamin, George Bishop Sudworth, Harvey Leroy Westover, James William Park, Joseph Stuart Caldwell, Leander D. Howell, Lloyd Ancil Spindler, M. A. Yothers, Raymond Frank Taylor, Robert Claude Wright, Robert Ellsworth Getty, Robert Pilson Albert Johnson, Thomas Ray Stanton, Tyler Frazier Akers, United States. Bureau of Agricultural Economics, Walter Huber Meyer, Wightman Wells Garner, William Henry Black, William Stuart, Edwin Harrison Milstead, Franklin Arthur Coffman, Harry August Schoth, Jay Laurence Lush, John Henry Zeller, Marsden Robert Brundage, Walter M. Peacock, Arthur Truman Semple, V. F. Tapke

1935

by Robert Pilson Albert Johnson, Marsden Robert Brundage

1934