000	00000nam 2200000zi 4500
001	9.877113
003	CaOODSP
005	20241203113650
006	m     o  d f
007	cr bn|||||||||
008	190729s1994    onca    ob   f000 0 eng d
040	|aCaOODSP|beng|erda|cCaOODSP
041	0 |aeng|beng|bfre
043	|an-cn-on
045	|ax6x9
086	1 |aEn13-5/94-58E-PDF
100	1 |aDobson, H. F. H. |q(Hugh F. H.)|eauthor.
245	10|aLake Ontario water quality trends, 1969 to 1992 : |bsome observational nutrient-science for protecting a major and vulnerable source of drinking water / |cHugh F.H. Dobson.
264	1|aBurlington, Ontario, Canada : |bAquatic Ecosystem Protection Branch, National Water Research Institute, Canada Centre for Inland Waters, |c[1994]
300	|a1 online resource (3 unnumbered pages, 32 pages) : |billustrations.
336	|atext|btxt|2rdacontent
337	|acomputer|bc|2rdamedia
338	|aonline resource|bcr|2rdacarrier
490	1 |aNWRI contribution ; |vno. 94-58
500	|aDigitized edition from print [produced by Environment and Climate Change Canada].
504	|aIncludes bibliographical references (pages 22-24).
520	|a"This paper is an empirical study of chemical indicators of biological water-quality, using 25 years of monitoring data for Lake Ontario offshore surface waters. (Trace toxic contaminants are not considered in this paper.) The paper focuses on long-term trends and extends the knowledge gained earlier by the author's Lake Ontario Water Chemistry Atlas (1984)"--Management perspective.
546	|aIncludes summaries in English and French.
692	07|2gccst|aLakes
692	07|2gccst|aWater quality
692	07|2gccst|aFertilizers
710	1 |aCanada. |bEnvironment Canada.
710	2 |aNational Water Research Institute (Canada). |bAquatic Ecosystem Protection Branch.
830	#0|aNWRI contribution ;|vno. 94-58.|w(CaOODSP)9.844121
856	40|qPDF|s2.23 MB|uhttps://publications.gc.ca/collections/collection_2019/eccc/en13-5/En13-5-94-58-eng.pdf