Letham, Lawrence. <br/><br/>
GPS fàcil  uso del Sistema de Posicionamiento Global 
 Global Positioning System fácil  Sistema de Posicionamiento Global 
Lawrence Letham. 
 - 3rd ed., SA rev. 
 - Seattle, WA  Mountaineers  c2001. 
 - 208 p.  ill., maps  22 cm. 
<br/><br/> Título original: GPS made easy. 
<br/><br/>Includes bibliographical references (p. 201) and index. 
<br/><br/><br/>Text in Spanish. 
<br/><br/><label>ISBN: </label>8480195916 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Outdoor recreation--Equipment and supplies.<br/>Spanish language materials<br/>Orienteering--Equipment and supplies.<br/>Global Positioning System.