00000nam 2200000za 4500 9.861825 CaOODSP 20241203113644 cr ||||||||||| 180912s1972 onc #ot f|0| 0 eng d CaOODSP eng n-cn--- En36-503/67E-PDF Guidelines for water quality objectives and standards [electronic resource] : a preliminary report / prepared by the working group on Water Quality Criteria of the Subcommittee on Water Quality, Interdepartmental Committee on Water, Department of the Environment. Ottawa : Dept. of the Environment, 1972. xii, 156 p. Technical bulletin - Inland Waters Directorate ; no. 67 Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographic references. "The material presented herein contains scientific findings and discussions from a wide range of international sources. It is a reference that has been urgently needed for many years, and is addressed to all who are concerned with and responsible for water quality and pollution control requirements in Canada"--p. iv. gccst Water quality gccst Water pollution Canada. Environment Canada. Canada. Inland Waters Directorate. Technical bulletin (Canada. Inland Waters Directorate) no. 67. (CaOODSP)9.861123 PDF 8.19 MB https://publications.gc.ca/collections/collection_2018/eccc/en36-503/En36-503-67-eng.pdf