Інформація
Sources
1.Harold E. Cox.
The Birney Car. Forty Fort, PA: Author, 1966.
2. Alan Lind.
From Horsecars to Streamliners: An Illustrated History of the St. Louis Car Company. Park Forest, IL: Transport History Press, 1978.
3. Benson W. Rohrbeck.
Beaver County Trolleys (Pennsylvania traction series). West Chester: Ben Rohrbeck Traction Publications, 1990.
See also
http://streetcars.telcen.com/ — a personal site of Dr. Harold E. Cox with author’s books and car builders’ order lists.