00381nam a2200121Ia 4500008004100000082002000041100002000061245007300081260003800154300001600192600001900208650003200227140224s9999    xx            000 0 und d  a631.461.1/.5 M6  aStevenson, F.J.  aCycles of soil; Carbon, Nitrogen, Phosphorus, Sulfur micronutrients/  aNew YorkbJohn Wiley & Sonsc1986  axviii,380p.  aF.J. Stevenson  aSoil science,Micronutrients