=LDR 22 4500 =001 4292 =082 04$a551.483 KIR =100 1\$aKirby, Celia =245 10$aPlynlimon research: the first two decades =260 \\$aWallingford, Oxon :$bInstitute of Hydrology,$c1991 =650 \0$aPamphlets =852 \\$bFreeman Library$h551.483 KIR