TY  - BOOK
AU  - Heywood,D.Ian
AU  - Carver,Steve
AU  - Cornelius,Sarah
TI  - An introduction to geographical information systems
SN  - 0131293176 (pbk)
PY  - 2006///
CY  - Harlow, England; New York
PB  - Pearson Prentice Hall
KW  - Geographic information systems
N1  - includes bibliograpical references and index
ER  -