Hurn, Jeff <br/><br/>
GPS :  A guide to the next utility / 
Jeff Hurn. 
 - Sunnyvale, Califirnia :  Trimble Navigation,  1989. 
 - 76 p. ;  il. ;  21 cm. 
<br/><br/><br/>Inglés 
<br/><br/><label>ISBN: </label> Normal 
<br/><br/><label>Dewey Class. No.: </label>526.64