=LDR 22 4500 =001 3987 =082 04$a551.31 BOU =100 1\$aBoulton, G. S. =245 10$aOn the origin and transport of englacial debris in Svalbard glaciers =260 \\$bJournal of Glaciology,$c1970 =650 \0$aPamphlets =852 \\$bFreeman Library$h551.31 BOU