00270nam a2200097Ia 4500008004100000082002100041245003300062260004800095300001000143650001900153140113s9999    xx            000 0 und d  a631.452:631.8 J6  aSoil fertility and fertizers  b"London : Macmillan and co., limited, 1956"  a430p.  aSoil fertility