TY  - BOOK
AU  - Shekhar,Shashi
AU  - Xiong,Hui
TI  - Encyclopedia of GIS
SN  - 9780387359755 (hbk.)
U1  - 910.285 
PY  - 2008///
CY  - New York
PB  - Springer
UR  - http://www.springerlink.com/content/978-0-387-30858-6/#section=145930&locus=0
ER  -