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.
— a personal site of Dr. Harold E. Cox with author’s books and car builders’ order lists.