TY  - BOOK
AU  - Heywood, D. Ian
AU  - Carver, Steve
TI  - An introduction to geographical information systems
SN  - 9788131731932
U1  - 910.285 HEY 
PY  - 2009///
CY  - London
PB  - Addison Wesley Longman
KW  - Geographic information systems
N1  - Includes index
ER  -