TY  - BOOK
AU  - Worboys,Micheal
AU  - Duckham,Matt
TI  - GIS: a computing perspective 
SN  - 0415283752
AV  - G70.2  .W67 2004
PY  - 2004///
CY  - Boca Raton, FL
PB  - CRC Press
KW  - Geographic information systems
ER  -