=LDR 22 4500 =001 5952 =082 04$a551.3 HOP =100 1\$aHope, R. =245 10$aThe wear of sandstone by cold, sliding ice =260 \\$bInstitute of British Geographers,$c1971 =650 \0$aPamphlets =852 \\$bFreeman Library$h551.3 HOP