TY  - BOOK
AU  - Heywood, Ian.
AU  - Cornelius, Sarah.
AU  - Carver, Steve.
TI  - An introduction to geographical information system
SN  - 0130162388
AV  - G 70.212 .H49 1998 
PY  - 1998///
CY  - New Jersey
PB  - Prentice Hall
KW  - Geographical information system
ER  -