TY  - BOOK
AU  - Heywood,D.Ian
AU  - Cornelius,Sarah
AU  - Carver,Steve
TI  - An introduction to geographical information systems / 
SN  - 0131293176 (pbk.)
AV  - G70.212   .H49 2006
PY  - 2006///
CY  - Harlow, England ; ,  New York : 
PB  -  Pearson Prentice Hall, 
KW  - Geographic information systems
N1  - Includes bibliographical references (p. [400]-411) and index
ER  -