On-sale date from ad in Showcase #56 and copyright registration.
Inside front cover; published in cooperation with the National Social Welfare Assembly.
Previously appeared in DC comics cover-dated May 1952.
Credits for script, pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics.
Story across 25 pages in three parts of 11.67 pages, 5.67 pages, and 6.5 pages.
This story follows the first appearance of Zatanna in Hawkman (DC, 1964 series) #4. Zatanna's quest continues in Green Lantern (DC, 1960 series) #42.
Letters from: Sal Iacopelli, Marv Wolfman, Doug Meuer, Duane Tank, Guy H. Lillian III.
On the page immediately following page 18 of the main story sequence.