Leonard, V. A. <br/><br/>
Police communication systems / 
V. A. Leonard. 
 - Berkeley, Calif. :  University of California Press,  1938. 
 - xvi, 589 p.  :  ill. ;  22 cm. 
 - Publications of the Bureau of public administration, University of California .
<br/><br/>Bibliography : p. 556-572. 
<br/><br/>339  339 
<br/><br/><label>LCCN: </label>38028448  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Police--United States<br/>Communication and traffic--United States
<br/><br/><label>LC Class. No.: </label> /   
<br/><br/><label>Dewey Class. No.: </label>621.384151 / L553p