TY  - BOOK
AU  - Heywood, Ian
AU  - Cornelius, Sarah
AU  - Carver, Steve
TI  - An introduction to geographical information systems
SN  - 9780273722595
U1  - 910.285 HEY/I;3 
PY  - 2011///
CY  - England
PB  - Pearson
KW  - GEOGRAPHICAL INFORMATION SYSTEMS
KW  - GIS
ER  -