Placement
- contained in Astounding Tales of Space and Timeanthology
- contained in Isaac Asimov Presents The Golden Years of Science Fictionanthology
- contained in People Machinescollection
- contained in Space Dreadnoughtsanthology
- contained in The Astounding Science Fiction Anthologyanthology
- contained in The Crucible of Powercollection
- contained in The First Astounding Science Fiction Anthologyanthology
- contained in The Great Science Fiction Stories Volume 2, 1940anthology