Cyril AytonBooksCar Mechanics Made SimpleBrough Superior from 1923Manx NortonWorld Motorcycles, No 1The History of motor cyclingJapanese motorcyclesVincent from 1938 (Reinstatement)International NortonTriumph Twins from 1937A-Z Guide to British Motorcycles from the 1930s to the 1970s (A-Z)Author data: Open Library