HTML ebook. Also available as plain text (us-ascii), without the illustrations. All available formats may be read or downloaded from ebook #24567.
Derived from Analog, December 1962. Includes six illustrations from that issue. The first is the magazine cover. Though Project Gutenberg does not note it, Analog credited this to Schoenherr. Artwork except for the magazine cover is by Schelling, whom Project Gutenberg credits as artist for the entire ebook. The second and third illustrations were originally a single illustration spanning two pages.
"Produced by Greg Weeks, Geetu Melwani and the Online Distributed Proofreading Team at http://www.pgdp.net"
