COATES, DONALD R. ENVIROMENATL GEOMORPHOLOGY AND LANDSCAPE CONSERVATION - 0 - PENNSYLVANIA-.U.S.A. DOWDEN, HUTCHINGON 1973 - 483 pag 26 cm - 0 0 . ISBN: 0-87933-040-6 Subjects--Topical Terms: CIENCIAS PURAS Dewey Class. No.: 551.4 / C261