The economic benefits of road transport projects /    
IBRD, IDA. 
 - [s.l] :   [s.n],   1968. 
 - 38, [16] p. ;    28 cm. 
 - Report ;   no. EC -160 .
<br/><br/>  March 18, 1968. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Transportation --Mathematical models------