00309nam a2200097Ia 4500008004100000082001500041100004000056245006900096260003800165300000800203140113s9999    xx            000 0 und d  a581.2   J9  a"Johnson, Leander. F. & Curl, E.A."  aMethods for studying soil microflora-plant disease relationships  a1959bBurgess Pub. Co.cMinn(USA)  a178