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| 02099nam 2200397zi 4500 |
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| 001 | 9.877113 |
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| 003 | CaOODSP |
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| 005 | 20221107164904 |
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| 006 | m o d f |
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| 007 | cr bn||||||||| |
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| 008 | 190729s1994 onca ob f000 0 eng d |
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| 040 | |aCaOODSP|beng|erda|cCaOODSP |
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| 041 | 0 |aeng|beng|bfre |
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| 043 | |an-cn-on |
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| 045 | |ax6x9 |
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| 086 | 1 |aEn13-5/94-58E-PDF |
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| 100 | 1 |aDobson, H. F. H. |q(Hugh F. H.)|eauthor. |
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| 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. |
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| 264 | 1|aBurlington, Ontario, Canada : |bAquatic Ecosystem Protection Branch, National Water Research Institute, Canada Centre for Inland Waters, |c[1994] |
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| 300 | |a1 online resource (3 unnumbered pages, 32 pages) : |billustrations. |
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| 336 | |atext|btxt|2rdacontent |
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| 337 | |acomputer|bc|2rdamedia |
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| 338 | |aonline resource|bcr|2rdacarrier |
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| 490 | 1 |aNWRI contribution ; |vno. 94-58 |
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| 500 | |aDigitized edition from print [produced by Environment and Climate Change Canada]. |
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| 504 | |aIncludes bibliographical references (pages 22-24). |
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| 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. |
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| 546 | |aIncludes summaries in English and French. |
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| 692 | 07|2gccst|aLakes |
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| 692 | 07|2gccst|aWater quality |
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| 692 | 07|2gccst|aFertilizers |
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| 710 | 1 |aCanada. |bEnvironment Canada. |
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| 710 | 2 |aNational Water Research Institute (Canada). |bAquatic Ecosystem Protection Branch. |
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| 830 | #0|aNWRI contribution ;|vno. 94-58.|w(CaOODSP)9.844121 |
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| 856 | 40|qPDF|s2.23 MB|uhttps://publications.gc.ca/collections/collection_2019/eccc/en13-5/En13-5-94-58-eng.pdf |
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