https://openlibrary.org/books/OL1440466M.opds Physical geology 2022-12-10T02:59:06Z Charles C. Plummer https://openlibrary.org/authors/OL403919A/Charles_C._Plummer Wm. C. Brown Dubuque, Iowa 1993 xiv, 537 p. : 6th ed. Includes bibliographical references and index. eng https://openlibrary.org/books/OL1440466M https://archive.org/details/physicalgeology00plum_0 urn:ISBN:0697138070 urn:ISBN:0697138062 93071981