Manual of traffic signs (revised) / 
Department of Public Works 
 - Puerto Rico :  bureau of traffic traffic engineering division,  1957. 
 - 180 h. :  il. ;  24 cm. 
<br/><br/> Manual de señales de tráfico 
<br/><br/> Alphaset series shown for each mesage refer to those in the standard alphabet for highway signs designed by the bureau of public roads of the U.S. departament of conmerce and approved by the american association of state highway officials. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Señales de trafico--Manual<br/>Señales de carretea
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Puerto Rico
<br/><br/><label>Dewey Class. No.: </label>343.094  / D26m