Placement
- contained in About Timecollection
- contained in American Fantastic Tales: Terror and the Uncanny from the 1940s to Nowanthology
- contained in The Arbor House Treasury of Modern Science Fictionanthology
- contained in The Best Time Travel Stories of the 20th Centuryanthology
- contained in The Great SF Stories #13 (1951)anthology
- contained in The Third Levelcollection