Love this comic.
It's featured in a book I have called "Over 50 Years of Comic Books". I must have read this book about a million times in my early 20s.
Your book is shown at the start of a new chapter called, "The Great Superhero Revival".
The caption reads;
"Even Charlton Comics, a second rank house that had managed to stay alive during the lean years of the 1950's, attracted some good artists in the sixties and introduced a line of costumed crime fighter. Onetime Spider-Man illustrator Steve Ditko put his simple, dramatic style to good use on the cover of Captain Atom #82"