TY  - GEN
AU  - Lo, C.P.
AU  - Yeung, Albert K.W.
TI  - Concepts and techniques of geographic information systems
SN  - 978-81-203-3914-9
U1  - 912 
PY  - 2011///
CY  - New Delhi
PB  - PHI Learning
KW  - GEO.--PRACTICAL
ER  -