Brace, James H.,

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

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