TY  - BOOK
AU  - Heywood,, Ian
AU  - Cornelius,, Sarah
AU  - Carver,, Steve
TI  - Introduction to geographical information systems / 
SN  - 81-7808-541-0
U1  - 551.028 5 
PY  - 2001///
CY  - New delhi
PB  - Pearson Education
KW  - Geology
N1  - Includes index, glossary and references
ER  -