00000nam 2200000za 4500 9.646565 CaOODSP 20200331142855 ta 150407|1996||||xxc||||| f|0| 0 eng d 0-662-25637-9 CaOODSP eng n-cn--- En42-17/5-1-1997E Canada. Environment Canada. Federal-Provincial Working Group on Air Quality Objectives and Guidelines. A protocol for the development of national ambient air quality objectives part 1: science assessment document and derivation of the reference level(s) Ottawa - Ontario : Environment Canada. 1996. iii, 49p. : 28 cm. "This document explains how scientific information is obtained, evaluated, and published in support of National Ambient Air Quality Objectives (NAAQOs). The rest of this section outlines the legal basis and development process."--Introduction. Bibliography. This document explains how scientific information is obtained, evaluated, and published in support of National Ambient Air Quality Objectives (NAAQOs). The rest of this section outlines the legal basis and development process.--Introduction Spiral binding 97-42 1997-10-17 Air quality gcpds Protocole pour l'élaboration des objectifs nationaux de qualité de l'air ambiant partie 1: rapport d'examen scientifique et détermination des niveaux de référence (CaOODSP)9.680101 A protocol for the development of national ambient air quality objectives (CaOODSP)9.867364