=LDR            22        4500
=001  6499
=082  04$a1995 SHE
=100  1\$aSheehan, Jonathan
=245  10$aShips' ballast water as a vector for the introduction of non-indigenous species: implications for Ireland
=260  \\$aDublin :$bUniversity of Dublin, Trinity College,$c1995
=650  \0$aTheses
=852  \\$bFreeman Library$h1995 SHE