TY  - BOOK
AU  - Lo, C. P.
AU  - Yeung, Albert K. W.
TI  - Concepts and techniques of geographic information systems
SN  - 81-203-2230-4
U1  - 911:681.516 
PY  - 2005///
CY  - New Delhi
PB  - Prentice-Hall of India
KW  - Geographical information systems
KW  - Geographic Information System
KW  - GIS
KW  - georgraphical ionformation systems
ER  -