"Worral , Les (ed.)" <br/><br/>
Geographic information systems 

 - London  Belhaven Press  1990 
 - 251p. 
<br/><br/><label>ISBN: </label>185293140X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geographic information systems
<br/><br/><label>Dewey Class. No.: </label>910.285 GEO