Handbook on geographic information systems and dig 

 - New York  United Nations USA         2000 
 - 197p. Bib p. 115-20,Appendix p. 121-97  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geography
<br/><br/><label>Dewey Class. No.: </label>U11:(D6,9(B)), P0