Witcover, Jules. Marathon : the pursuit of the Presidency, 1972-1976 / Jules Witcover. - New York : Viking Press, c1977. - xvii, 684 p. ; 25 cm. Includes index. ISBN: 0670454613 LCCN: 77004387 LC Class. No.: E868 .W57 1977 / .W57 1977 Dewey Class. No.: 329/.023/730925