Placement
- contained in Captain Future Series & Moreomnibus
- contained in The Edmond Hamilton Megapack: 16 Classic Science Fiction Talescollection
- contained in The Sargasso of Space and Two Others / The Copper-Clad Worldomnibus
- contained in The Science Fiction Novel Super Pack #1anthology
- contained in Two Worlds of Edmond Hamiltoncollection
- contained in What's It Like Out There? and Other Storiescollection