TY  - BOOK
AU  - Heywood, D. Ian.
AU  - Cornelius, Sarah.
AU  - Carver, Steve.
TI  -  An introduction to geographical information systems
SN  - 9780273722595 (pbk.)
U1  - 910.285  22
PY  - 2011///
CY  - Harlow, England,  Toronto
PB  - Prentice Hall
KW  - Geographic information systems
N1  - Includes bibliographical references and index
ER  -