Usselman, S. W. (2002). Regulating railroad innovation: Business, technology, and politics in America, 1840-1920. Cambridge University Press.
Dyfyniad Arddull ChicagoUsselman, Steven W. Regulating Railroad Innovation: Business, Technology, and Politics in America, 1840-1920. Cambridge, U.K. ; New York: Cambridge University Press, 2002.
Dyfyniad MLAUsselman, Steven W. Regulating Railroad Innovation: Business, Technology, and Politics in America, 1840-1920. Cambridge University Press, 2002.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.