"Telegraph Hill Railroad". The Cable Car Home Page – Cable Car Lines in San Francisco. Joe Thompson. 1 July 2009. Retrieved 20 September 2009. The Telegraph Hill Railroad was not a cable car line ...; it was a funicular railway
Hofmann, Gottfried (3 January 2007). "Advanced funicular technology". International Organization for the Study of Transportation. San Francisco, Calif.: International Organization for the Study of Transportation by Rope; Internationaler Seilbahnkongress.