Gorr, W.L. <br/><br/>
Learning and Using Geographic Information Systems 
By W. L. Gorr 
 - New Delhi  Cengage learning  2009 
<br/><br/> Engineering 
<br/><br/><label>ISBN: </label>978-81-31507-605 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English