McNamara, Joel. , <br/><br/>
GPS for dummies / 
Joel McNamara. 
 - 2nd ed. 
 - xviii, 386 pages :  illustrations ;  24 cm. 
<br/><br/><label>ISBN: </label>9780470156230 0470156236 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Global Positioning System.<br/>Cartography.<br/>Maps.<br/>Orienteering --Equipment and supplies.
<br/><br/><label>LC Class. No.: </label>G109.5   / .M52 2008