=LDR 22 4500 =001 4554 =082 04$a2002 HIN =100 1\$aHinch, Claire =245 10$aQuantifying variation in depth to bedrock: an important indicator of groundwater vulnerability =260 \\$aDublin :$bUniversity of Dublin, Trinity College,$c2002 =650 \0$aTheses =852 \\$bFreeman Library$h2002 HIN