=LDR 22 4500 =001 3032 =082 04$a2002 FLO =100 1\$aFlood, Eleanor =245 10$aAn investigation of ammonium ions in precipitation and in the atmosphere in Dublin, Ireland =260 \\$aDublin :$bUniversity of Dublin, Trinity College,$c2002 =650 \0$aTheses =852 \\$bFreeman Library$h2002 FLO