=LDR 22 4500 =001 1670 =082 04$a551.41 DUR =100 1\$aDury, G. H. =245 10$aEssays in Geomorphology =260 \\$aLondon :$bHeinemann,$c1966 =650 \0$aBooks =852 \\$bFreeman Library$h551.41 DUR