When The Unliving Strike First Appearance of Advanced Idea Mechanics (A.I.M.) - "A.I.M. is not a mere business organization...but rather a society of the greatest intellects on Earth!! Our purpose is simple...we wish to benefit mankind!"
Also contains a Dr. Strange story - "The End -- At Last", where Clea's name is finally revealed.
This is also Steve Ditko's last issue (along with Amazing Spider-Man #38) during his 'initial tenure' at Marvel. Later to return in 1979.