Geographical information systems / 
edited by Paul A. Longley...[et al.] 
 - 2nd ed. 
 - New York :  John Wiley & Sons,  1999 
 - 2 v. :  ill. ;  25 cm. 
<br/><br/>v.1-Principles and technical issues- v.2-Management issues and applications 
<br/><br/><label>ISBN: </label>0471331325 (v.1) 0471331333 (v.2) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geographic information systems