General
LEWIS, Donald C. & DORIN, Patrick C.
Rail America - Diesel Paint Schemes, Photos & Rosters for CN North America
MARRE, Louis A.
Diesel-Locomotives: The First 50 Years
A guide to diesels built before 1972
McDONNELL, Greg
Heartland
Collection of high quality photographs taken across the Midwest from the 1950's to the 1980's.