TY  - BOOK
ED  - Environnement Canada
TI  - Environmental science & technology / Environnement Canada
SN  - 0662203496
U1  - 363.7 
PY  - 1993///
CY  - Ottawa, Canadá: 
PB  - Environment Canadá, 
KW  - CANADÁ
KW  - POLÍTICA MEDIOAMBIENTAL
N1  - 1. Key Issues.-- 2. Envionments Canada's Institutes and Laboratories.-- 3. Research Establishments.-- 4. Clean Air
ER  -