TY  - BOOK
AU  - Simonett, O.V.
TI  - goegraphical information systems for enviroment and development
AV  - WX 173 U54 1993 
PY  - 1992///
CY  - Zurich
PB  - United nations Enviromental Program
KW  - Information Systems|growth & development|Evaluation Studies
ER  -