Chrisman, Nicholas. <br/><br/>
Exploring geographic information systems.   
by Nicholas Chrisman 
 - New York  J-W  1997 
 - xvi, 298p. 
<br/><br/><label>ISBN: </label>0471108421 
<br/><br/><label>Dewey Class. No.: </label>025.0691  / N97