TY  - BOOK
AU  - Lo C P
AU  -  Yeung Albert K W
TI  - Concepts and techniques of geographic information systems
T2  - Prentice-Hall Series In Geographic Information Science
U1  - U:(D6,9(B), P2 
PY  - 2002///
CY  -  New Delhi 
PB  - Prentice-Hall Inc India       
KW  - Modern - Geography
N1  - Appendix P 447-76
ER  -