Story in two parts: unnumbered part 1 (5.67 pages) and Part 2 (8.67 pages).
House ad for DC comics.
"Thanks to Randy Puckett of Houston, Texas," presumably for the idea.
House ad for Showcase (1956 series) #63.
Letters of comment from Paul Laginess, Alan Trahern, Ingrid Nuernberg, Stan Sawicki and Frank Klein.
Credits for script, pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics.