00289nam a2200109Ia 4500082002100000100003600021245004800057260002600105300001500131500000500146700002800151  a338.973bP485.ED  aPeterson, J. M. and Gray, Ralph  aEconomic development of the United Statesb  aIllinoisbIrwinc1969  axiv, 551p.  a  aGray, Ralph ; jt. auth.