by Murray Leinster
Available on page 244, Bleiler (Gernsback).
In addition to its stand-alone volume, this title was published in the follow books. It can be rated independently of any volumes containing it.
Worlds of Wonder (1949)
by Olaf Stapledon
Collection, 284 pages
Quadratic (1953)
by Murray Leinster, Olaf Stapledon
Omnibus, 298 pages
The Second Murray Leinster Megapack (2012)
Omnibus, 736 pages
Murray Leinster Collection: Volume 2 (2017)
Omnibus, 544 pages
Sci-Fi Ultimate Collection (2018)
by uncredited
Omnibus
