Observer's book of aircraft ; 1962 Observer's book of aircraft ; 1963 Observer's book of aircraft ; 1964 Observer's book of aircraft ; 1965 Observer's book of aircraft ; 1966 Observer's book of aircraft ; 1967 Observer's book of aircraft ; 1968 Observer's book of aircraft ; 1969 Observer's book of aircraft ; 1971 Observer's book of aircraft ; 1973 Observer's book of aircraft ; 1974 Observer's book of aircraft ; 1976
