Placement
- contained in Analog: The Best of Science Fictionanthology
- contained in Early del Reycollection
- contained in Selections from The Astounding Science Fiction Anthologyanthology
- contained in Space Pioneersanthology
- contained in The Astounding Science Fiction Anthologyanthology
- contained in The Astounding Science Fiction Anthology (abridged)anthology
- contained in The Early del Rey: Volume 2collection
- contained in The Second Astounding Science Fiction Anthologyanthology