TY  - BOOK
AU  - Longley,Paul A.
TI  - Geographic information systems: principles, techniques, management, and applications 
SN  - 0471735450
PY  - 2005///
CY  - Hoboken, NJ
PB  - John Wiley & Sons
KW  - Geographic information systems
N1  - Includes bibliographical references
ER  -