TY  - BOOK
AU  - Heywood,Jan, Carver, Steve and others
AU  - x
TI  - An introduction to geographical information systems: x
SN  - 8178085410
U1  - 910.9/H622i 
PY  - 2002///
CY  - Delhi
PB  - Pearson Education
KW  - Geographic information systems
KW  - Geography
N1  - Includes
ER  -