Clemmer, Gina. <br/><br/>
GIS 20 Essential Skills / 
By Gina Clemmer. 
 - 1st Ed. 
 - California :  Esri Press,  2014. 
 - 185 p. ;  00 cm. 
<br/><br/><label>ISBN: </label>9781589483224 
<br/><br/><label>Dewey Class. No.: </label>910.285  / CLE