Standard Specifications for Structural Supports for Highway Signs,Luminaires and Traffic Signals / 

 - 4th.ed. 
 - America :  2001  AASHTO, 
 - various pages :  ill.  ;  30cm 
<br/><br/><label>ISBN: </label>1560513462 
<br/><br/><label>Subjects--Topical Terms: </label><br/>AASHTO
<br/><br/><label>Dewey Class. No.: </label>625.794 AAS