00249nam a2200097Ia 450000500170000000800410001705000150005810000150007324500280008826000350011620251229191242.0251229s9999    xx            000 0 und d  aS 519  .V6  aVoysey, A. 0aFarm Studies.cA Voysey  aOxfordb  Pergamon pressc1966