551.4/THO LCBkB/524 LCBkB/551.4/THO B37991
Thornbury , William D Principles of geomorphology / William D. Thornbury. - 2nd ed. - - NewYork : John Willey, 1954 ix , 594p. : ill. figures : 20cm. Includes bibliograpical references and index * * Geology * Geomorphology
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