TY  - BOOK
ED  - United Nations Environment Programme.
ED  - GEMS Monitoring and Assessment Research Centre.
ED  - World Resources Institute.
TI  - Environmental data report
SN  - 0631180834
PY  - 1991///
CY  - Oxford
PB  - Basil Blackwell
KW  - Environmental pollution
KW  - Environmental monitoring
N1  - Latest ed. kept in RR
ER  -