TY  - GEN
AU  - Heywood, Ian
AU  - Cornelius, Sarah
AU  - Carver, Steve
TI  - An introduction to Geographical information systems
SN  - 9788131731932
U1  - 910.285 
PY  - 2010///
CY  - New Delhi
PB  - Pearson
KW  - Geographic information systems
KW  - Geography
KW  - GIS usage
ER  -