=LDR 22 4500 =001 4446 =082 04$a551.4 EAS =100 1\$aEasterbrook, Don J. =245 10$aPrinciples of geomorphology =260 \\$aNew York :$bMcGraw-Hill,$c1969 =650 \0$aBooks =852 \\$bFreeman Library$h551.4 EAS$zNot located