On inside front cover.
JCA stands for Jason Comic Art.
Al Eugster's art credit from his records given by Mark Mayerson at his archived webpage, "Al Eugster's Comic Book Work" (http://www.oocities.org/hollywood/boulevard/3131/comic.html, the archive from the Mayerson's defunct GeoCities website, retrieved 2 October 2020).
Title of the story was assigned by Eugster in his records to identify his work.
JCA stands for Jason Comic Art.