000 00327 a2200133 4500
080 _a551.4
_bT 497 P
245 1 _aPrinciples of geomorphology
_cby W.D. Thornbury
250 _a2nd edn.
260 _aNew York
_bJohn Wiley
_c1969
650 _aGeomorpholory
100 1 _aThornbury, W.D.
_d
300 _a594 p.
901 _a129058
999 _c68518
_d68518