Stover, Carl W. Seismicity of the United States, 1568-1989 (revised) / by Carl W. Stover and Jerry L. Coffman. - Washington : U.S. G.P.O., 1993. - v, 418 p. : ill., maps ; 29 cm. - U.S. Geological Survey professional paper ; 1527 . Includes bibliographical references (p. 400-417). Subjects--Topical Terms: Earthquakes--United States. Dewey Class. No.: 551.220973