Geogarphic information systems for environment and development :   inaugural dissertation. 

 - Zurich :   United Nations Environment Programme,   1992. 
 - Information series ;   no. 19. .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geographic information systems.--------
<br/><br/><label>Dewey Class. No.: </label>MISR 573.4 GEO