Introduction to geographic information systems 
Chang, Kang-tsung. 
 - Fourth edition. 
 -  McGraw-Hill.  2008 
 - xiv, 450 pages 
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<br/><br/><label>ISBN: </label>978-0-07-125920-0 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geographic information systems.
<br/><br/><label>Dewey Class. No.: </label>910.185 C36i 2008