The Cultivation of Corn by Benjamin Koehler, Harold Hall McKinney, Frank Lincoln Stevens, David Cleveland Wimer, Harold Clayton M. Case, James Lloyd Edmonds, Mary Helen Keith, Oliver Ralph Overman, Raymond Stratton Smith, William Garfield Kammlade, Arthur Knapp Mackey, Chalmers Woodruff Crawford, Frank Paul Sanmann, George Harlan Dungan, James Ransom Holbert, Kenneth Hayes Myers, Marion Boyer Harland, Orda Allen Plunkett, Frederick Alexander Davidson, Robert William Webb