Showdown in the Standard Deviation Kingdom

Showdown in the Standard Deviation Kingdom ("Hyōjun hensa ōkoku de no taiketsu" 標準偏差王国での対決) is a one-shot chapter of the Astro Boy manga which originally ran in the weekly supplement magazine of the Asahi newspaper in February 1976.

Collected Volumes
This story has been collected in the following volumes:


 * ''Astro Boy Special, Volume 1
 * Astro Boy, Volume 22 (Dark Horse)