00383nam a2200145Ia 4500008004100000082001700041100001500058245002200073250000600095260003100101300000800132650004100140650003400181653002200215170901s1975    xx            000 0 und d  a631.46bW13S  aWalker, N. 0aSoil Microbiology  a1  aLondonbButterworthsc1975  a262  aAgriculture and related technologies  aTechnology (Applied sciences)  aSoil microbiology