Schwarz, John I. <br/><br/>
Police roadblock operations 
by John I. Schwarz 
 - Springfield  Charles C Thomas  1962 
 - xii, 79p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Police
<br/><br/><label>Dewey Class. No.: </label>W41 Sch96