Various GNRHS reference sheets
From Zephyr to Amtrak, David Randall
Railway Age magazine, June, 1951
The Official Pullman-Standard Library, Vol. 3
The Passenger Car Library, Vol. 3, David Randall
Car Numbers Names and Consists, Wayner
Great Northern Ry. List of Equipment, 1963
Great Northern Ry. List of Equipment, 1965
Great Northern Ry. List of Equipment, 1969
GN Color Guide to Passenger and Freight Equipment, David H. Hickox
Great Northern Pictorials Viol. 1-5, Joseph. W Shine and John F. Strauss
The Great Northern Railway, Charles and Dorothy Wood