Formas alternativas del nombreIron horses (Railroads)
Lines, Railroad
Rail industry
Rail lines
Rail transportation
Railroad industry
Railroad lines
Railroad transportation
Railway industry
Railways
Fuentes consultadas1. Goble, P. Death of the iron horse, 1986.
2. LC database, July 17, 1995 titles: rail line(s); railroad line(s)
3. LC database, Oct. 12, 2007 rail industry; railroad industry; railway industry
4. Trails of the iron horse : an informal history, 1975.
5. UMI business vocab. Railroad transportation
Referència de vegeu tambénames of individual railroads; and headings beginning with the word Railroad