TY  - BOOK
AU  - Heywood,Ian
AU  - Cornelius,Sarah
AU  - Carver,Steve
TI  - An introduction to geographical information systems
SN  - 0130611980 (pbk.)
AV  - G70.2 HEY 
PY  - 2002///
CY  - Essex
PB  - Pearson Education
KW  - Geographical Information Systems
N1  - Includes bibliographical references and index
ER  -