Geographic information systems :  a guide to the technology / 
John C. Antenucci ... [et al.] 
 - New York :  Van Nostrand Reinhold,  1991 
 - 301 p. :  ill. ;  28 cm. 
<br/><br/><label>ISBN: </label>0442007566 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geographic information systems