Chrisman Nicholas <br/><br/>
Exploring geographic information systems 
Chrisman Nicholas 
 - 2nd 
 - New York  John Wiley U S A       2002 
 - xiv,305p.  cm. 
<br/><br/> Bib p. 285-92 
<br/><br/><label>ISBN: </label>0 471 314250 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geography-Modern
<br/><br/><label>Dewey Class. No.: </label>U:(D6,9(B), N7;P2