Cosmic Checkmate is UB Only.
10,000 worlds against one
Use for educational purposes only. Single copies (print, photocopy, download) are permitted for personal study, research, and teaching.
With: King of the Fourth Planet
not identified, DeVet, Charles, and MacLean, Katherine, “Cosmic Checkmate,” Digital Collections - University at Buffalo Libraries, accessed May 28, 2022, https://digital.lib.buffalo.edu/items/show/28919.