A BBC Engineering Division Test Card Monograph with 26 Test Card Photographs, A BBC Engineering Division Test Card Monograph with 26 Test Card Photographs, the booklet titled' Number 69: September 1967, A survey of the development of television test cards used in the BBC, by, G. Hersee, M.I.E.R.E.', blue grey papers Note: A historical review of the design of early test cards, followed with a discussion of the purposes of test cards, the influence of reproduction problems on their design, the monograph describes the design and manufacture of the, then, latest Trade Test Card ‘F’, for use with a colour service, giving various examples of specialised test cards and their uses, with 26 photographs of test cards on paper reference cards all in a green folder