TY  - BOOK
AU  - Burrough .Peter A
TI  - Principles of Geographical Information Systems
SN  - 0-19-823365-5
U1  - 910.28521 
PY  - 2000///
CY  - London
PB  - Oxford press
KW  - Principles of Geographical Information Systems
N1  - Principles of GIS
ER  -