Hartmann, William K. Astronomy : the cosmic journey William K. Hartmann. - 4th ed. - Belmont, Calif. : Wadsworth Pub. Co., c1989. - xx, 694 p., [4] p. of plates : col. ill. ; 25 cm. Includes index. Bibliography: p. 673-683. ISBN: 0534095763 LCCN: 88014815 Subjects--Topical Terms: Astronomy. LC Class. No.: QB45 / .H32 1989 Dewey Class. No.: 520