Neteler, Markus <br/><br/>
Open Source A Grass Gis Approach/ 
Markus Neteler,Helena Mitasova 
 - 3th ed 
 - England:  Spring,  2008 
 - 406p:  ill;  24cm 
<br/><br/><label>ISBN: </label>9780387357676 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geographic information systems
<br/><br/><label>LC Class. No.: </label>G70  / .N486 2008