Ruchelman, Leonard I.,  1933- <br/><br/>
Police politics :  a comparative study of three cities / 
by Leonard Ruchelman. 
 - Cambridge, Mass. :  Ballinger,  1974. 
 - xi, 118 p. ;  24 cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0884102068 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Police--Political activity.--New York (N.Y.)<br/>Police--Political activity.--Pennsylvania--Philadelphia<br/>Police--Political activity.--Illinois--Chicago