Douglas - The Complete Story
Mick Walker | inglese | copertina rigida | 176 p. | 2010
The Book of 1930's British Motorcycle Gearboxes and Clutches
inglese | brossura | 118 p. | 2018
The Book of the Post-War Douglas - All Models (1948-1957)
Douglas Ltd. | inglese | brossura | 138 p. | 2013
The Book of the Pre-War Douglas - All Models (1929-1939)
L.K. Heathcote | inglese | brossura | 90 p. | 2013