U.S Deppt of Transportation <br/><br/>
Guidelines on the use of changeable message signs  summary report 

 - Washington  The World Bank  c1991 
 - vi, 45 p. :  ill,  24 cm 
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<br/><br/><label>Subjects--Topical Terms: </label><br/>MCE
<br/><br/><label>Dewey Class. No.: </label>388.13122  / GUI