The Whizzer Sportsman Motorcycle was manufactured by the Whizzer Motor Company at their plant in Pontiac, Michigan from 1949 through 1953. Collector site advertises book on the marque.
Triples OnLine - a source for information about the Triumph Trident (T150, T160, X75) and the BSA Rocket 3 (A75). These classic British motorcycles were produced from 1968 until 1975/6.