TY  - BOOK
AU  - Longley,Paul A.
TI  - Geographical information systems
SN  - 0471331325 (v.1) 0471331333 (v.2)
PY  - 1999///
CY  - New York
PB  - John Wiley & Sons
KW  - Geographic information systems
N1  - v.1-Principles and technical issues- v.2-Management issues and applications
ER  -