00269nam a2200109Ia 4500008004100000082001400041100002100055245002500076260002800101300001000129650002000139140113s9999    xx            000 0 und d  a631.86 J9  a" Sykes, Friend"  aModern humus farming  b"Faber and Faber, 1959"  a270p.  aFarm management