TY  - GEN
AU  - Chang , Kang-tusung
TI  - Introduction to geographic information systems
SN  - 0070495521
U1  - 025.0691 
PY  - 2004///
CY  - New Delhi
PB  - Tata McGraw-Hill Publishing Company Limited
KW  - GEOGRAPHIC INFORMATION SYSTEMS
KW  - LIBRARY AND INFORMATION SCIENCE
KW  - GTS
KW  - CD
ER  -