Seeds, Michael A. Horizons : exploring the universe / Michael A. Seeds. - 1987 ed. - Belmont, Calif. : Wadsworth Pub. Co., c1987. - xv, 484, [28] p. of plates : ill. (some col.) ; 24 cm. Includes bibliographies and index. ISBN: 0534079261 (pbk.) LCCN: 86028109 Subjects--Topical Terms: Astronomy. LC Class. No.: QB45 / .S44 1987 Dewey Class. No.: 520