Pencil and ink credits confirmed from Julius Schwartz's editorial records, provided by DC Comics.
Page count confirmed from Julius Schwartz's editorial records, provided by DC Comics. Story in three chapters: unnumbered chapter 1 (6.67 pages), Chapter 2 (6.67 pages), Chapter 3 (10.67 pages); Chapters 2 and 3 with title "Conquerors of Time!".
Published in cooperation with the National Social Welfare Assembly.
On the page immediately following page 7 of the main story sequence. This PSA is produced in sequential comics-art style.
Letters from Richard Weingroff, Geneva Hawkins, Thomas Zmigrocki, Larry Brown, Jeff Reynolds, Albert Romano, Kenneth Drost, Ken Gentry, Edwin M. Eisenberg.
On the two pages immediately following page 14 of the main story sequence.