TY  - BOOK
AU  - Heywood,D.Ian
AU  - Cornelius,Sarah
AU  - Carver,Steve
TI  - An introduction to geographical information systems / 
SN  - 0582089409
AV  - G70.212 .H49 1998
U1  - 910.285/ H622i 22
PY  - 1998///
CY  - New York
PB  - Longman
KW  - Geographic information systems
N1  - Includes bibliographical references (p. 253-266) and index; Geology, Generalia
ER  -