TY  - GEN
AU  - Heywood, Ian
AU  - Carver, Steve
AU  - Cornelius, Sarah
TI  - An introduction to geographical information systems
SN  - 8178089823
U1  - 910.285 
PY  - 2002///
CY  - Delhi
PB  - Pearson Education
KW  - Geography
KW  - Travel
ER  -