000 00416nam a22001697a 4500
015 _a6789
080 _a551.48
_bPET
100 _aPetts, G. E.
245 _aSource and methods in geography river
260 _aButterworth & Co. Ltd
_bLondon
_c1983
300 _a228p.
_bfig.
852 _a2R 1-4
999 _c2196
_d2196