Transactions of the American Society of Civil Engineers, vol. LXVIII, Sept. 1910
The New York Tunnel Extension of the Pennsylvania Railroad.
The East River Tunnels. Paper No. 1159
Transactions of the American Society of Civil Engineers, Vol. LXVIII, Sept. 1910
The New York Tunnel Extension of the Pennsylvania Railroad.
The Cross-Town Tunnels. Paper No. 1158