=LDR            22        4500
=001  3837
=082  04$a551.09 ALL
=100  1\$aAllen, P.
=245  10$aNature's catastrophies: large events in 4.5 billion years of Earth history
=260  \\$bTrinity College Dublin, Department of Geology, Dublin,$c1998
=650  \0$aPamphlets
=852  \\$bFreeman Library$h551.09 ALL