Proceedings. 

 - Washington :   National Research Council. Division of Engineering and Industrial Research,   1949. 
 - 620 p. :   figuras 
<br/><br/> Economics, finance and administration - Design - Materials and construction - Maintenance - Traffic and operations - Soils - General. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>CARRETERAS
<br/><br/><label>Universal Decimal Class. No.: </label>625.72