Placement
- contained in Concentrationcollection
- contained in Epochanthology
- contained in Galaxy's Edge: Omnibus #2: Complete Contents from Issues 4, 5 & 6anthology
- contained in Masters of Science Fiction: Jack Danncollection
- contained in The Best Time Travel Stories of All Timeanthology
- contained in The Best Time Travel Stories of the 20th Centuryanthology
- contained in Timetippingcollection
- contained in Visitationscollection