Transactions of the American Society of Civil Engineers, vol. LXVIII, Sept. 1910 : The New York Tunnel Extension of the Pennsylvania Railroad, The North River Division. Paper No. 1151 [electronic resource] /
Charles M. Jacobs
- Project Gutenberg, 2006
- Project Gutenberg 18548 .
Public domain in the USA.
Electronic text
Civil engineering -- Periodicals Railroad tunnels -- Design and construction