00277nam a22001097a 4500003000400000008004100004082001600045100002200061245003100083260004500114300000800159OSt230612b        |||||||| |||| 00| 0 eng d  a551.4bT42P  aThornliuary, W.D.  aPrinciple of Geomorphology  aWiley/ ToppenbIAB Books, Calcuttac1969  a594