00257nam a2200097Ia 4500008004100000082001900041100002900060245003100089260003100120300000800151140113s9999    xx            000 0 und d  a576.8[63]   K2  a"Woodbine, Makolm., Ed."  aAntibiotics in Agriculture  a1962bButterworthscLondon  a439