TY  - GEN
AU  - Heywood , Ian
AU  - Cornelius , Sarah 
AU  - Carnver , Steve
TI  - An introduction to geographical information systems
SN  - 9814053228
U1  - 910.285 
PY  - 1998///
CY  - England
PB  - Longman
KW  - DATABASE MANAGEMENT SYSTEMS
KW  - COMPUTER SCIENCE
UR  - www.awl he . com
ER  -