00315nam a2200109Ia 4500008004100000082002200041100002600063245003400089260005300123300001000176650001900186140113s9999    xx            000 0 und d  a631.81.095.337 K9  a" Sauchelli, Vincent"  aTrace elements in agriculture  b"New york : Van nostrand reinhold company, 1969"  a248p.  aTrace elements