Letham, Lawrence. <br/><br/>
GPS made easy :  using Global Positioning Systems in the outdoors / 
Lawrence Letham. 
 - 4th ed., WAAS rev. 
 - Seattle, WA :  Mountaineers Books,  2003. 
 - 208 p. :  ill., maps ;  22 cm. 
<br/><br/>
<br/><br/><label>ISBN: </label>0898868238 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Global Positioning System. NUST <br/>Orienteering--Equipment and supplies.<br/>Outdoor recreation--Equipment and supplies.
<br/><br/><label>Dewey Class. No.: </label>796.510284  / LET