Mason, Ryan <br/><br/>
Openinf  communication channels / 
by Ryan Mason 
 - California:  Bobit Business Media,  March 2015. 
 - Page 12 - 15.  26.8cm. 
 - Monthly 
 - Volume 34, number 1 (January 2015) 
 - Police: The Law Enforcement Magazine .
 - Police: The Law Enforcement Magazine  Volume 39, number 3  0893-8989 .
<br/><br/><label>ISSN: </label>0893-8989 
<br/><br/><label>Dewey Class. No.: </label>BPer. 363.205  / P75