TY  - BOOK
AU  - Heywood, Ian, 
AU  - Cornelius,  Sarah, 
AU  - Carver,  Steve ;
TI  - An Introduction to Geographical Information systems
SN  - 9788178085418 
U1  - 910.02 
PY  - 1998///
CY  - Delhi
PB  - Pearson Education
N1  - Included Glossary, Index
ER  -