00000nas 2200000zi 4500 9.912246 CaOODSP 20221107182525 m o d f cr ||||||||||| 220614d19701992oncar p o f0###a0eng|d 0381-2995 CaOODSP eng rda CaOODSP eng fre n-cn--- En49-34-PDF National Air Pollution Surveillance, annual summary = Surveillance nationale de la pollution atmosphérique, sommaire annuel. Surveillance nationale de la pollution atmosphérique sommaire annuel National air pollution surveillance, annual summary. Surveillance nationale de la pollution atmosphérique, extrait annuel Surveillance atmosphérique, annuel [Ottawa] : Air Pollution Control Directorate, 1970-1994. Annual text txt rdacontent computer c rdamedia online resource cr rdacarrier Began with 1970; ceased with 1992. Environmental protection series = Série de la protection de l'environnement Digitized edition from print [produced by Environment and Climate Change Canada]. Text in English and French. Issued by: Environmental Protection Service, 1977; Technical Services Branch, Environmental Protection Programs Directorate, 1982-1984; by Technology Development and Technical services Branch, Environmental protection, Conservation and Protection, 1985- ; Technology Development Directorate, -1992. Latest issue consulted: 1992. Air Pollution Canada Periodicals. Air quality Canada Periodicals. Canada. Environmental Protection Service, issuing body. National Air Pollution Surveillance (NAPS) network, annual summary for ... = (CaOODSP)9.912304 National Air Pollution Surveillance, annual summary = fre (CaOODSP)9.912259