Longley, Paul A <br/><br/>
Geographical information systems (2vols)  : v.1 principles and technical issues 

 - New York  John Wiley  1999 
<br/><br/><label>ISBN: </label>0471321826 
<br/><br/><label>Subjects--Index Terms: </label>
<br/><br/><label>Dewey Class. No.: </label>910.285