HTML ebook. Also available as plain text (iso-8859-1 & us-ascii), minus artwork; all formats available from Ebook # 24064.
Produced from Astounding, May 1960. The HTML version includes reproductions of artwork by Van Dongen from that issue, including the cover of the issue; this story was the cover story.
The listings at the top of the edition give the author's name as "Gordon Randall Garrett"; however, the listing within the text gives this as "Randall Garrett".
"Produced by Greg Weeks, Bruce Albrecht, Mary Meehan and the Online Distributed Proofreading Team at http://www.pgdp.net".