TY  - BOOK
AU  - Bernhardsen, Tor
TI  - Geographic information systems: : An introduction
SN  - 9788126511389
U1  - 910.285 BER/G 
PY  - 2002///
CY  - New Delhi
PB  - New Delhi
KW  - INFORMATION SYSTEMS
KW  - GIS
ER  -