D1 World Aircraft directory
(1961)
D2-1 Fighting Vehicles directory (1969)
D2-2 Fighting Vehicles directory (1972)
D3 Military Vehicles directory
(1972)
D4 Basic Military Aircraft directory (1974)
D5 Basic Civil Aircraft directory (1974)
D6 Army Vehicles directory
(1974)
D7 Soviet Aircraft directory
(1975)
D8-1 Airlines and Airliners directory (1975)
D8-2 Airlines and Airliners directory (1980)
D9 Spaceflight directory
(1978)
D10 Directory of British Steam Locomotives (1980-1982)
