Gorr, W.L. <br/><br/>
Learning and Using Geographic Information Systems 
By W.L. Gorr 
 - New Delhi  Cengage learning  2009 
 - 261 
<br/><br/> Engineering 
<br/><br/><label>ISBN: </label>978-81-315076-05 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Civil