Jim Shooter, Marvel's then editor-in-chief, conceived of the idea,DeFalco, Tom. "Bullpen Bulletins Special," Marvel Comics cover-dated March 1984. envisioning a guide detailing statistics much in the manner of those found on the backs of baseball cards.Peter Sanderson (2005-01-28). "Comics in Context #70: Elektra Lite: Superheroes A to Z."
