00448nam a2200145Ia 4500001001000000003000500010008004100015010001100056040000900067111007800076245004000154260005800194300001000252650004000262Para_6316CHAP220125s1956    xx            000 0 und d  a205047  cCHAP  aSymposium on the use of metal chelates in plant nutrition (1956: Seattle)  aReport /c edit. by Arthuir Wallace  aPalo Alto, Calif. :b Western Society of Soil Science  a80 p.  aPlantas x nutrición x congresos