TY  - BOOK
AU  - Gorr,Wilpen L.
AU  - Kurland,Kristen S.
TI  - Learning and using geographic information systems: ArcGIS edition 
SN  - 9781418835583
AV  - G70.212  .G67 2007
PY  - 2007///
CY  - New York
PB  - Thomson
KW  - Geographic information systems
ER  -