00279nam a2200109Ia 4500008004100000082001400041100002600055245003800081260002000119300001000139650002000149140113s9999    xx            000 0 und d  a631.95 M3  a" Lockertez, William"  aEnvironmentally sound agriculture  b"Praeger, 1983"  a426p.  aOrganic farming