=LDR 22 4500 =001 2444 =082 04$a551.49 LAF =100 1\$aLaFleur, R. G. =245 10$aGroundwater as a geomorphic agent =260 \\$aBoston, Mass. :$bAllen & Unwin,$c1984 =650 \0$aBooks =852 \\$bFreeman Library$h551.49 LAF