Low-cost water crossings =  Travesías de agua de bajo costo = Ouvrages de franchissement d'eau économiques / 
Transportation Research Board, Commission on Sociotechnical Systems, National Research Council. 
 - Washington :  National Academy of Sciences,  1979. 
 - xxii, 176 p. :  ill. ;  28 cm. 
<br/><br/> "Prepared under contract AID/OTR-C-1591, project 931-1116, U.S. Agency for International Development."  Includes index. 
<br/><br/>
<br/><br/><label>ISBN: </label>0309028167 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Bridges--Developing countries.<br/>Bridges.<br/>MCE
<br/><br/><label>Dewey Class. No.: </label>624.208  / NAT