As far as I can tell, there were two preliminary Aero parts books (1952 - 685 and 675), one 1952 Wing and Ace (685) book (there may also be a regular issue 675 book but I have not seen one), one passenger car parts manual (1953) and three supplements (1954, 1954-1955 [c 1955] and 1954-1955 [c 1956]. pics of covers attached.