Previously published as 'The players of Null-A'. London: Dobson, 1970. - Originally published as 'The pawns of Null- A'. New York: Street and Smith, 1948.
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The pawns of Null-A by A. E. Van Vogt. ISBN 0722187661. Published by Sphere in 1972. Publication and catalogue information, links to buy online and reader comments.
