Brace, James H. <br/><br/>
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  [electronic resource] / 
James H. Brace 
 -  Project Gutenberg,  2006 
 - Project Gutenberg  18722 .
<br/><br/> Public domain in the USA. 
<br/><br/>Electronic text 
<br/><br/><label>Subjects--Index Terms: </label>Civil engineering -- Periodicals Railroad tunnels -- Design and construction 
<br/><br/><label>LC Class. No.: </label>TA