=LDR 22 4500 =001 2050 =082 04$a551.48 PIT =100 1\$aPitty, Alistair F. =245 10$aGeographical Approaches to Fluvial Processes =260 \\$aNorwich :$bGeo Abstracts Ltd,$c1978 =650 \0$aBooks =852 \\$bFreeman Library$h551.48 PIT