00273nam a2200109Ia 4500008004100000082001700041100002100058245003900079260001600118300001000134650001900144140113s9999    xx            000 0 und d  a631.461.9 J5  a" Swaine, D. J."  aThe trace-element content of soils  b"CAB, 1955"  a157p.  aTrace elements