TY  - BOOK
AU  - Chang, Kang Tsung 
TI  - Introduction to geographic information systems 
SN  - 0-07-049552-1 
U1  - 658.45 CHA  
PY  - 2002///
CY  - Tata mcgraw hill 
PB  - New Delhi 
KW  - MANAGEMENT
ER  -