Roberts A. John <br/><br/>
Communications for law enforcement professionals / 
John Roberts A. 
 - Toronto:  Emond montgomery,  2003. 
 - x ,214 p. : 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>1552391280 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Law
<br/><br/><label>LC Class. No.: </label>HV7936. C79R62 2003