TY  - BOOK
AU  - Bernhardsen,Tor
TI  - Geographic information systems: an introduction 
SN  - 9788126511389
U1  - 910.285 22
PY  - 2002///
CY  - India
PB  - Wiley
KW  - Geographic information systems
N1  - Includes bibliographical references (p. 413-417)
ER  -