TY  - BOOK
AU  - Nag,Prithvish
AU  - Sengupta,Smita
TI  - Geographical information system: concepts and business opportunities 
SN  - 8180694364
U1  - 910.285 
PY  - 2007///
CY  - New Delhi
PB  - Concept Pub
KW  - Geographic information systems
N1  - Includes bibliographical references and index
ER  -