Available in unpaginated HTML, plain text (us-ascii & iso-8859-1), & Plucker formats from Ebook #24149.
Produced from Astounding, April 1960. The HTML version includes artwork from that issue attributed to Scoenherr (an obvious typo for "Schoenherr", whether original to Gutenberg or to Astounding).
The second illustration is in two parts, separated by text; possibly these should be labeled as two separate illustrations.
The Project Gutenberg wrapper gives the author as William Fitzgerald Jenkins, the text as Murray Leinster.
"Produced by Greg Weeks, Bruce Albrecht, Mary Meehan and the Online Distributed Proofreading Team at http://www.pgdp.net".
