00434nam a2200109Ia 4500008004100000082004500041100011200086245003900198260003700237300001400274650003600288140224s9999    xx            000 0 und d  a631.81.095' 337:581.13 1947 (082.2) J0;1  aSymposium on Trace Element in plant physiology. Rothamsted, Rothamsted Experimental station, Nov.5-6, 1947.  aTrace elements in plant physiology  aWalthambChronica Botanicac1950  axix,144p.  aTrace elements,Plant physiology