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      <marc:subfield code="a">Jeffries, Dean Stuart, </marc:subfield>
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      <marc:subfield code="a">The predicted effect of SO2 emission controls on the water quality of eastern Canadian lakes / </marc:subfield>
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      <marc:subfield code="c">[1991].</marc:subfield>
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      <marc:subfield code="a">"RRB 91-27."</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">Lam, D. C. L. </marc:subfield>
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