=LDR 22 4500 =001 3398 =082 04$a551.447 SMI =100 1\$aSmith, D. I. =245 10$aLimestones and caves of the Mendip Hills =260 \\$aNewton Abbot :$bDavid and Charles,$c1975 =650 \0$aBooks =700 1\$aDrew, David =852 \\$bFreeman Library$h551.447 SMI