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Mission of Gravity

by Hal Clement

ISBN 13: 9780575040229

Format: Paperback (192 pages)
Publisher: Gollancz
Published: 01 May 1987

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Heavy Planet: The Classic Mesklin Stories

by Hal Clement

ISBN 13: 9780765303684

Format: Illustrated (416 pages)
Publisher: Tor Books
Published: 27 Nov 2002

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