00285nam a2200121 a 450000500170000002000150001708200170003210000250004924500210007425000120009526000370010730000190014420251203091701.0  a0697062619  a551,bD, mon  aMontgomery, Carla W.  aPhysical geology  a2nd ed.  aLoNew DelhionbWm.C. Brownc1990  axvi,556p, 26cm