TY  - GEN
AU  - Burrough, Peter A.
AU  - Mc Donnell, Rachael A.   
TI  - Principles of geographical information systems
SN  - 0199228620
U1  - 910.285 
PY  - 2007///
CY  - New York
PB  - Oxford university Press
KW  - TRAVEL
KW  - GEOGRAPHY
ER  -