Ovenden, Michael W. Life in the universe a scientific discussion. - [1st ed.] - Garden City, N.Y. Anchor Books 1962. - 160 p. illus. 18 cm. - Science Study series. S23 . LCCN: 62009324 /L/r89 Subjects--Topical Terms: Plurality of worlds.Life Biology LC Class. No.: QB54 / .O9 Dewey Class. No.: 577