Illinois Mineral Industry in 1944
Charles C. Boley, Harold Bowen Willman, Chalmer Lewis Cooper, Cullen Warner Parmelee, Heinz Adolf Lowenstam, Stewart Huntley Folk, Frank Emerson Tippie, Cameron Gerald Harman, Frederick Leicester Cuthbert, Leland Horberg, Ralph Early Grim, Roy John Helfinstine, Walter Henry Voskuil, Douglas F. Stevens, Nina T. Hamrick, Robert Ramon Reynolds, William Hubert Allaway, Paul Herbert
