Our space environment / Phillip D. Stern. Coordinating editor: James V. Bernardo. Stern, Phillip D. Astronomy Popular works. QB44 .S812 529.4 STO Includes bibliographical references : p. 154-155. &index. New York : Holt, Rinehart and Winston, c1965. c1965. 1965 Text 160 p. eng Holt library of science, ser. 3