Sumner, John S. Geophysics, geologic structures, and tectonics /John S. Sumner - Dubuque, Iowa W. C. Brown Co., 1969 - ix, 115 p.- - Brown foundations of earth science series . Includes references and index. ISBN: 254790 Subjects--Topical Terms: Geophysics. Dewey Class. No.: 551 / SUM