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[en] [Gutenberg 18722] • 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
Brace, James H. & Mason, Francis & Woodard, S. H.
![[Gutenberg 18722] • 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](/cover/G9r9W94qZ6Y4tcXT/small/[Gutenberg%2018722]%20%e2%80%a2%20Transactions%20of%20the%20American%20Society%20of%20Civil%20Engineers,%20vol.%20LXVIII,%20Sept.%201910%20/%20The%20New%20York%20Tunnel%20Extension%20of%20the%20Pennsylvania%20Railroad.%20/%20The%20East%20River%20Tunnels.%20Paper%20No.%201159.jpg)