Pioneering space : living on the next frontier / James E. Oberg and Alcestis R. Oberg ; foreword by Isaac Asimov. Oberg, James E., 1944- Oberg, Alcestis R., 1949- Space stations. TL797 .O33 1986 919.9 OBP Includes bibliographical references and index. New York : McGraw-Hill, c1986. c1986. 1986 Text xiv, 298 p., [24] p. of plates : eng