Bell, J. Snowden (January 1901). "A Curiosity in Locomotive Design". Railway and locomotive engineering; a practical journal of motive power, rolling stock and appliances. Vol. XIV. New York: Angus Sinclair Company. p. 13. OCLC1763393.
Bell, J. Snowden (January 1901). "A Curiosity in Locomotive Design". Railway and locomotive engineering; a practical journal of motive power, rolling stock and appliances. Vol. XIV. New York: Angus Sinclair Company. p. 13. OCLC1763393.