=LDR 22 4500 =001 5353 =082 04$a551.4 SMA =100 1\$aSmall, R. J. =245 10$aThe Study of Landforms: a textbook of geomorphology =260 \\$aLondon :$bCambridge University Press,$c1970 =650 \0$aBooks =852 \\$bGeography Basement$h551.4 SMA