Zubrin, Robert. Entering space : creating a spacefaring civilization / Robert Zubrin. - New York : Jeremy P. Tarcher/Putnam, c1999. - xiv, 305 pages col. ill. ; 24 cm. Includes bibliographical references and index. ISBN: 0874779758 LCCN: 99024725 Subjects--Topical Terms: Space colonies. Subjects--Geographic Terms: Outer space--Exploration. LC Class. No.: TL795.7 / .Z83 1999 Dewey Class. No.: 919.9/04