Produced by Greg Weeks, Greg Bergquist, Bruce Albrecht and the Online Distributed Proofreading Team at https://www.pgdp.net [Transcriber's Note: This etext was produced from Astounding Science Fiction April, May and June 1960. Extensive research did not uncover any evidence that the U.S. copyright on this publication was renewed. Minor typographical errors have been corrected without note.]…
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