Amazing Spider-Man Vol.1 #40
Spider-Man battles the Green Goblin; While battling, an explosion erases the last several years of Norman Osborn's memory, reverting him to his pre-Green Goblin state.
Printed: Sept 1966
Writers: Stan Lee
Art: John Romita Sr. and Mike Esposito [as Mickey Demeo]
Cover: John Romita Sr. and Mike Esposito