Geographical information systems / 
Paul A. Longley... [et al.]. 
 - 2nd ed. 
 - New York :  John Wiley & Sons, Inc.,  1999. 
 - 2 v. :  ill. (some col.) ;  27 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/>v. 1. Principles and technical issues -- v. 2. Management issues and applications. 
<br/><br/><label>ISBN: </label>0471331325 (vol. 1) 0471331332 (vol. 2) 0471321826 (set) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geographic information systems.
<br/><br/><label>LC Class. No.: </label>G70.2  / G45 1999