A history and description of the Baltimore and Ohio Railroad by a citizen of Baltimore. Baltimore, 1853.
Baltimore and Ohio Railroad Company. A list of the officers and employees of the Baltimore and Ohio Railroad for November, 1857. Baltimore, 1857.
——. Third annual report of the president and directors to the stockholders of the Baltimore and Ohio Rail Road Company. Baltimore: 1829. (Also the fourth through 38th annual reports. Baltimore, 1830-1864.)
——. Baltimore and Ohio exhibits at the Century of Progress. Chicago, 1934.
Biographical cyclopedia of representative men of Maryland and the District of Columbia. Baltimore, 1879.
Bollman, Wendel. Iron suspension and trussed bridge as constructed for the Baltimore and Ohio Rail Road Co. at Harper’s Ferry, and on the Washington branch of this road. Baltimore, 1852.
——. Letter to John W. Garrett dated June 17, 1862. In files of Division of Mechanical and Civil Engineering, United States National Museum, Washington, D.C.
——. Report of Mr. Bollman in relation to Central Ohio Rail Road. Baltimore, 1854.