Não informado. (1953). Railway Track and Structures. Simmons Boardman Publishing.
Chicago-referens (17:e uppl.)Não informado. Railway Track and Structures. Bristol, Conn: Simmons Boardman Publishing, 1953.
MLA-referens (8:e uppl.)Não informado. Railway Track and Structures. Simmons Boardman Publishing, 1953.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.