00307nam a2200109Ia 4500008004100000082002200041100002700063245003400090260004400124300001000168650001900178140113s9999    xx            000 0 und d  a631.81.095.337 L2  a". Dinauer, Richard C"  aMicronutrients in agriculture  b"Soil science society of America, 1972"  a666p.  aMicronutrients