00550nam a2200193Ia 4500001001000000003000500010008004100015010001100056040000900067082001900076100001900095245010600114260001900220300001000239440002500249500003800274650001900312650002500331Para_7014CHAP220125s1913    xx            000 0 und d  a205760  cCHAP  aPA-C 631.4 B85  aGreaves, J. E.  aThe influence of arsenic upon the biologial transformation of nitrogen in soils  /c by J. E. Greaves  as.l.  :b s.e.  a16 p.  aBiochemical bulletin  aEnc. con otros impresos similares  aSuelos x EUA   aSuelos, nitrogeno en