Placement
- contained in All the Traps of Earth and Other Storiescollection
- contained in Dusty Zebra and Other Storiescollection
- contained in Hellhounds of the Cosmos and Other Tales from the Fourth Dimensioncollection
- contained in Impossible Things: Four Classic Talescollection
- contained in The Fourth Golden Age of Science Fiction Megapack: Clifford D. Simakomnibus
- contained in The Night of the Puudlycollection
- contained in The Time Travel Megapack: 26 Modern and Classic Science Fiction Storiesanthology