00389nam a2200133Ia 4500008004100000082001400041100001900055245003800074260003000112300001500142600003700157600003300194650002800227140224s9999    xx            000 0 und d  a338:63 K1  aHeady, Earl O.  aAgricultural production functions  aLudhianabKalyanicc 1961  aviii,667p.  a Earl O.Heady and John L.Dillon.  aDillon, John, L., jt. author  aAgricultural production