Spirals for street railway curves and easement curves for street railway branch-offs : complete formulas and tables
- publisher: Steelton, Pa. : The Company
- creator: Pennsylvania Steel Company. Frog and Switch Dept
- Keyword: Railroads Curves and turnouts Catalogs. Street-railroads Equipment and supplies Catalogs. Street-railroads Design and construction.
- years: c1906.
- pages: 96 p. :
- class: TF217
- download: pdf file
