3G handy guide : event mamangement 
3G E-learning. 
 -  3G E-learning LLC.  2019 
 - ix, 276 pages 
<br/><br/>
<br/><br/><label>ISBN: </label>978-1-68094-908-7 
<br/><br/><label>Dewey Class. No.: </label>394.2068 H23696 2019