Chrisman Nicholas <br/><br/>
Exploring geographic information systems 
Chrisman Nicholas 
 - New York  John Wiley U S A       1997 
 - xvi,298p. Bib p. 273-82  cm. 
<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