TY  - GEN
AU  - Lo, C. P.
AU  - Yeung, Albert K. W.
TI  - Concepts and techniques of geographic information systems
SN  - 9788120339149
U1  - 910.285 
PY  - 2007///
CY  - New Delhi
PB  - PHI Learning (Pvt) Ltd.
KW  - Geographic information systems
KW  - Geography
ER  -