Harrison, H. H. <br/><br/>
Automatic street traffic signalling (Apparatus and methods) / 

 - London :  Sir Isaac Pitman and Sons,  1934. 
 - x, 187 p. :  ill. ;  22 cm. 
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Traffic engineering<br/>Urban transportation<br/>Automatic control systems
<br/><br/><label>Dewey Class. No.: </label>625.79 HAR