TY  - BOOK
AU  - Albert K. W. Yeung
AU  - C. P. Lo
TI  - Concepts and techniques of geographic information systems
SN  - 81-203-2230-4
U1  -  910.285 
PY  - 2003///
CY  - New Delhi,India
PB  - Prentice Hall of India
KW  - Geographic information system
ER  -