1977 - On the Nature of the Universe (Paperback) → Paperback, Hardcover ISBN-13: 9780140440188 ISBN-10: 0140440186 Genres: Literature & Fiction, Nonfiction 1 1958 - The Travels of Marco Polo (Paperback) → Paperback, Hardcover, Audio Cassette ISBN-13: 9780140440577 ISBN-10: 0140440577 Genres: Biographies & Memoirs, History, Reference, Travel 6 |