Highway tunnel operations. 

 - Washington :  Transportation Research Board, National Research Council,  1975. 
 - 29 p. :  ill. ;  28 cm. 
 - Synthesis of highway practice ;  31 .
<br/><br/> "Research sponsored by the American Association of State Highway and Transportation Officials in cooperation with the Federal Highway Administration."  "Project 20-5 FY '73." 
<br/><br/>Bibliography: p. 24-25. 
<br/><br/><label>ISBN: </label>0309023386 :  $3.20 
<br/><br/><label>LCCN: </label>75033459  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Tunnels--United States.
<br/><br/><label>LC Class. No.: </label>TA804.U6  / N37 1975 
<br/><br/><label>Dewey Class. No.: </label>624.19