//-->
A congressional history of railways in the United States
Haney, Lewis H., (1968)
Productivity in US railroads : proceedings of a symposium, held at Princeton Univ., July 27 - 28, 1977
Kerr, Arnold D., (1980)
The Credit Mobilier of America : its origin and history, its work of constructing the Union Pacific Railroad and the relation of members of Congress therewith
Crawford, Jay Boyd, (1969)