TY  - BOOK
AU  - Burrough, Peter A.
AU  - Mcdonnell, Rachael A.
TI  - Principles of Geographical Information Systems 
SN  - 0198233655
U1  - 910.285 
PY  - 1988///
CY  - Oxford : 
PB  - Oxford University Press, 
KW  - Geographic Information Systems
N1  - NN
UR  - https://eaklibrary.neduet.edu.pk:8443/catalog/bk/books/toc/0-19-823365-5.pdf
ER  -