On-sale date from ad in Showcase #42 and copyright registration.
Credits for pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics.
Story in four parts of 7.67, 7.67, 3.67 and 4.67 pages.
On the page immediately preceding page 9 of the main story sequence.
On the two pages immediately following page 16 of the main story sequence.
On the page between page 20 and page 21 of the main story sequence.