00509nam a2200169Ia 4500082001900000100003700019245004000056260004400096300001500140500000500155690000600160700003200166952010000198964001700298921000900315999001500324  a338.1bH433.AP  aHeady, E. O. and Dillon, John L.  aAgricultural production functionsb  aIowabIowa State University Pressc1961  aviii, 667p  a  a   aDillon, John L. ; jt. auth.  00104070aISIbISId1998-08-14l0o338.1 H433.APpDP2122r2019-02-14 00:00:00w2019-02-14yBK  abcdefg  a4427  c4427d4427