Placement
- contained in Audiobook Collectionomnibus
- contained in Beyond the Safe Zonecollection
- contained in Capricorn Gamescollection
- contained in Earth's Other Shadowcollection
- contained in First-Person Singularitiescollection
- contained in Needle in a Timestack and Other Storiescollection
- contained in Parsecs and Parablescollection
- contained in Ringing the Changescollection
- contained in To the Dark Star: 1962-69collection
- contained in World's Best Science Fiction: 1971anthology