On-sale date from copyright registration.
1) Colors credit from Keith Chandler via the GCD Error Tracker (http://errors.comics.org/show_bug.cgi?id=7805). 2) The vine-swinging cougar-kicking scene on the cover is not in the book, but rather in issue #20, "The Thundering Earth!"
Inside front cover.
Includes a plug for polio research.
Inside back cover.