=LDR 22 4500 =001 5182 =082 04$a551.4 THO =245 00$aSpace and time in geomorphology =260 \\$aBoston, Mass. :$bAllen & Unwin,$c1982 =650 \0$aBooks =700 1\$aThorn, Colin E. =852 \\$bFreeman Library$h551.4 THO