French, Gregory T. <br/><br/>
Understanding the GPS  : an introduction to the global positioning system : what it is and how it works 
/ by Gregory T. French 
 - Bethesda  : GeoResearch  , 1996 
 - 255 p.  
<br/><br/><label>ISBN: </label>0-9655723-O-7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>GPS (Sistema de Posicionamiento Global)