TY  - BOOK
AU  -  Bernhardsen,Tor
TI  - Geographic Information Systems : : An Introduction 
SN  - 8126511389
U1  - 910.285  
PY  - 2007///
CY  - New Delhi
PB  - Wiley
KW  - Geographic information systems
KW  - Cartography—Data processing
N1  - Includes index and bibliographies
ER  -