TY  - BOOK
AU  - Longley, Paul A
AU  - ...[et al.]
TI  -  Geographical information systems (2vols): : v.1 principles and technical issues
SN  - 0471321826
U1  - 910.285 
PY  - 1999///
CY  - New York
PB  - John Wiley
ER  -