Realm of the universe / George O. Abell. Abell, George O. (George Ogden), 1927-1983. Astronomy. QB45 .A163 520 19 ABR "A completely new revision of ... [the author's] older brief edition of Exploration of the universe" and "a short and updated companion to the third (1975) edition of Exploration of the universe." Includes index. Bibliography: p. 369-370. New York : Holt, Rinehart and Winston, c1976. c1976. 1976 Text x, 431 p. eng