TY  - GEN
AU  - Nag, Prithvish 
AU  - Sengupta, Smita
TI  - Introduction to geographical information systems
SN  - 9788180694400
U1  - 910.285 
PY  - 2008///
CY  - New Delhi
PB  - Concept Publishing Company 
KW  - Geography
KW  - Geographic Information System
KW  - India
ER  -