TY  - BOOK
AU  - Burrough, Peter A
AU  - McDonnell, Rachael A
TI  - Principles of geographical information systems 
SN  - 9780199228621 (13)
U1  - 910.285 
PY  - 1998///
CY  - New York
PB  - Oxford  University 
KW  - Geographical Information Systems
KW  - GPS
UR  - https://www.amazon.com/Principles-Geographical-Information-Systems-Spatial/dp/0198233655/ref=sr_1_1?s=books&ie=UTF8&qid=1497853214&sr=1-1&keywords=0198233655#reader_0198233655
ER  -