On-sale date from copyright registration.
Cover pencils and inks credits from Julius Schwartz's editorial records, provided to the GCD by DC Comics.
On the page immediately following the previous sequence.
Facts on the average speed of the 100-yard run, the orbit of Halley's Comet, the speed of a hurricane wind and function of the spectroscope.
On the page immediately preceding page 9 of "Menace of the Super-Gorilla!"
Facts on speed records: three USAF B-52 superfortress planes non-stop around world, the first crossing of the Atlantic Ocean, the Indianapolis Speedway Auto Race and swimming across the English Channel.