Placement
- contained in Invaders from Spaceanthology
- contained in Tales in Spaceanthology
- contained in Tales of Science Fiction: Featuring X-Minus Oneanthology
- contained in The 29th Golden Age of Science Fiction Megapackcollection
- contained in The Diploidscollection
- contained in The Fourth Science Fiction Megapack: 25 Modern and Classic Science Fiction Storiesanthology
- contained in The Great SF Stories #13 (1951)anthology