Object-lesson and experimental roads, and bridge construction, 1912-13. 
 Object lesson and experimental roads, and bridge construction, 1912-13. 

 - Washington :  Govt. Print. Off.,  1913. 
 - 34 p. ;  23 cm. 
 - Bulletin of the U.S. Department of Agriculture ;  no. 53 .
<br/><br/> Contribution from the Office of Public Roads. 
<br/><br/><label>LCCN: </label>agr14000007  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Bridges--Design and construction.<br/>Roads--Design and construction.
<br/><br/><label>LC Class. No.: </label>S21  / .A7 no. 53 
<br/><br/><label>National Agricultural Library Call No.: </label>1  / Ag84B no.53