Rafferty, Tod. The Complete Harley-Davidson. Wisconsin, Motorbooks International Publishers & Wholesalers, 1997, XL engines circa 1962-1965 on pp. 86 and 87.* |
Mitchel, Doug. Harley-Davidson ® Rolling Sculpture ™, Barnes & Noble, Inc., 1999, Shovelhead engines circa 1966 shown and described on pp. 72-74.* |
1994 Harley-Davidson Genuine Parts Catalog—pp. 7 and 20. |
Mitchel, Doug, Harley-Davidson Rolling Sculpture, 1999 Publications International, Ltd., Lincolnwood, Illinois; published by Barnes & Noble, Inc., Shovelhead rocker box cover on p. 73 and Evolution engine on p. 101. |
Henshaw, Peter, The Encyclopedia of the Motorcycle, Edison, New Jersey, Chartwell Books, Inc., 1999, rocker box cover on the Brough-Superior (circa 1932) at the top right corner of p. 61. |
Harley-Davidson 1340 Models Parts Catalog, p. 8, 1993-1994. |
Harley-Davidson Custom Chrome Catalog, p. 362, 1994. |
Harley-Davidson Genuine Motor Accessories and Genuine Motor Parts Catalog, pp. 26 and 162, 1996. |
J & P Cycles Catalog, pp. 7-25 and 7-26, 1997. |