=LDR 22 4500 =001 3647 =082 04$a551.3 PRI =100 1\$aPrior, D. B. =245 10$aA method of monitiring mudflow movements =260 \\$aAmsterdam :$bElsevier [for] the Royal Botanical Society of the Netherlands,$c1970 =650 \0$aPamphlets =700 1\$aStephens, Nicholas =852 \\$bFreeman Library$h551.3 PRI