Prithvish Nag. <br/><br/>
Geographical information system concept& busins opp. / 
Prithvish Nag. 
 -  Concept Pub. Co. New Delhi 
 - 520 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geography
<br/><br/><label>Dewey Class. No.: </label>910.285  / NAGG