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      <marc:subfield code="a">Rao, S. S. </marc:subfield>
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      <marc:subfield code="a">Effects of lake acidification on microbial populations and processes / </marc:subfield>
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      <marc:subfield code="a">Digitized edition from print [produced by Environment and Climate Change Canada].</marc:subfield>
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      <marc:subfield code="a">"Bacteriological data collected for water and sedinent cores fran some Ontario lakes receiving acidic deposition indicates that bacterial populations and activities were diminished by 20-30% under acidic conditions"--Abstract.</marc:subfield>
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      <marc:subfield code="u">https://publications.gc.ca/collections/collection_2019/eccc/en13-5/En13-5-86-224-eng.pdf</marc:subfield>
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