Hartmann, William K. Astronomy : the cosmic journey / William K. Hartmann. - Belmont, Calif. : Wadsworth Pub. Co., c1978 - xi, 536 p. : ill. ; 24 cm. Includes indexes. Bibliography: p. 523-534. ISBN: 0534005462 Subjects--Topical Terms: Astronomy. Dewey Class. No.: 520 / HAA 1978