Theunderground gun market/ 
by The University of Chicago Crime Lab 
 - USA:  International association of chiefs of police,  2016 
 - page 14-15 
 - Vol.83 No. 3 ( March 2016 ) 
 - The Police Chief  page 14-15  Volume 83 Number 3  0032-2571 .
<br/><br/><label>Dewey Class. No.: </label>BPer.363.02  / P758