Chalmer Lewis Cooper / Cullen Warner Parmelee / Ernest Paul Du Bois / Frank Emerson Tippie / Frank Hynes Reed / Harold Bowen Willman / Heinz Adolf Lowenstam / Illinois State Geological Survey / James Stewart Machin / Leland Horberg / Ralph Early Grim / Robert Mann Grogan / Roy John Helfinstine / Stewart Huntley Folk / Walter Henry Voskuil / William Frank Bradley / William Heyden Easton / Cameron Gerald Harman / Carl Andrew Bays / Douglas F. Stevens / Frederick Leicester Cuthbert / Harold Wesley Jackman / John Everts Lamar / Robert Ramon Reynolds / Nina T. Hamrick / Paul Herbert / Paul Wellana Henline | 