"Originally published in single magazine form in Showcase #4, #8, #13, #14 and The Flash #105-106, copyright 1956-1959" --Vol. 1, t.p. verso.
"Originally published in single magazine form in The Flash #107-112, copyright 1959, 1960" --Vol. 2, t.p. verso.
The Flash chronicles by Robert Kanigher. ISBN 9781401228842. Published by DC Comics in 2009. Publication and catalogue information, links to buy online and reader comments.