Neteler, Markus <br/><br/>
Open Source Gis   : A Grass Gis Approach 

 - New York:  Springer Verlag  2007 
 - 406p. :   il; 25 cm. 
<br/><br/><label>ISBN: </label>978-0-387-35767-6 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Topografía Geodesia