Credits for pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics (added by Gregory Fischer, May 2009).
"Pilgrims of Peril!" (1 page), "The Challenge From Beyond!" (Part One, 6.67 pages), "The Hundred Year-Long Day!" (Part 2, 9.5 pages), "Ashes to Ashes... Dust to Dust" (Part Three, 4.5 pages).
Letters credit per Mark Evanier via the GCD Error Tracker: "some display lettering was roughed in in pencil by Grandenetti but it's really Gaspar lettering in the story." Jerry Grandenetti credit for lettering first suggested by Alan Stewart in Amazing Heroes #112, pg. 36, submitted by Ted Watson.
Credits for script, pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics [May 2008].