  1998 - All About Ufos [The World of the Unknown] (Hardcover) ISBN-13: 9781840560114 ISBN-10: 1840560118 ?  1990 - Illustrated Encyclopedia of Space Technology the Revised Edition (Hardcover) ISBN-13: 9780517574270 ISBN-10: 0517574276 Genres: Reference, Science & Math 1  Robots Science and Medicine Into the 21st Century [The World of the Future] (Paperback) ISBN-13: 9780860202400 ISBN-10: 0860202402 Genres: Computers & Technology, Engineering & Transportation ?  Usborne Book of the Future (Other) ISBN-13: 9780860202905 ISBN-10: 0860202909 Genre: Children's Books ? |
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