1. Lythgoe, Richard F., May 3, 1979 King, R.T. Indiana University » Center for Documentary Research and Practice » Collection: ohrc041: Economic History of Indiana in the Twentieth Century, 1976-1980
2. DeForest, Jack, April 8, 1981 Hartzer, Ronald Indiana University » Center for Documentary Research and Practice » Collection: ohrc041: Economic History of Indiana in the Twentieth Century, 1976-1980