00340nam a2200097Ia 4500008004100000082004900041100003200090245007000122260004200192300000800234140113s9999    xx            000 0 und d  a"631.417.2(100)""1975.8.18/22""(082.2)   L5"  a"Novak, B., et al�, Eds."  aStudies about Humus : Transactions of the international symposium  a1975bInst. Of Plant NutritioncPraha  a489