Higdon, Hal. Marathon : the ultimate training and racing guide / by Hal Higdon. - Emmaus, Penn. : Rodale Press, c1993. - xv, 207 p. ; 23 cm. Includes index. ISBN: 0875961592 LCCN: 92041569 Subjects--Topical Terms: Marathon running.Marathon running--Training. LC Class. No.: GV 1065 / .H54 1993