Fitzgerald and Merritt 'Ferrari, The Sports and Gran Tourismo Cars' 1968; Peter Roberts 'Any colour so long as it's black..' 1976; James T.Crow 'Stories of Road & Track' 1970; Automobile Quarterly (vol 3 No.4, vol 4 No.4, vol 7 No.4); Automobile Connoisseur No.s 1-4; and other books of similar interest. (33)