Public roads :  a journal of highway research 

 - Washington, D.C. :  United States Government Printing Office,  1968 
 - 28 p. :  ill., ports. ;  30 cm. 
<br/><br/> Cover title 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Roads--United States<br/>Cars--Highway research--United States
<br/><br/><label>Dewey Class. No.: </label>625.20973