North America
CUMMINGS, O. R. & LEAVITT, Edward D.
Street Cars to Old Orchard Beach - The Bideford & Saco Railroad and Connecting Lines
CUMMINGS, O. R. & MUNGER, Charles F.
The Shore Line Electric Railway Company
Transportation Volume 13 Parts 1 & 2 [October 1960 & August 1961]
CUNNINGHAM, Gerald F. & CUMMINGS, C.R.
A Forgotten Industry - Newburyport and Amesbury Streetcar Builders: The Newbury Car Manufacturing Co., The Ellis Car Company, The Briggs Carriage Company
De VITO, Michael C.
Diary of a Trolley Road - Hartford & Springfield Street Railway Co.
Transportation Bulletin No. 80 January - December 1973
DEAN, J.S.
The ABC of the Electric Car [1925]
Westinghouse technical publication describing the motors, electrics and operation of trolleys with illustrations and diagrams throughout.
DEMORO, Harre W.
California's Electric Railways - An Illustrated Review
Interurbans Special 100
