by Murray Leinster
Available on page 247, Bleiler (Gernsback).
This title was published in the follow books. It can be rated independently of any volumes containing it.
The Time Travelers: A Science Fiction Quartet (1985)
by Robert Silverberg, Martin H. Greenberg
Anthology, 284 pages
The Mammoth Book of Classic Science Fiction: Short Novels of the 1930s (1988)
by Isaac Asimov, Martin H. Greenberg, Charles G. Waugh
Anthology, 572 pages
Part of the The Mammoth Book of ... Science Fiction (by decade) series.