00420naa a2200157 a 450000100080000000500110000800800410001910000170006024500570007726000090013465000120014365000160015570000130017170000180018477300600020216058271995-06-27       1984    bl ---       0--  u    #d1 aHOFFMANN, I.  aA method for determining ammonia nitrogen in waters.  c1984  aMétodo  aNitrogênio1 aNAGY, B.1 aSCHNEIDER, J.  tActa Hydrochim. Hydrobiol.gv.12, n.6, p.645-651, 1984.