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 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)