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      <marc:subfield code="a">En49-1/2-1</marc:subfield>
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      <marc:subfield code="a">Elder, F. C., </marc:subfield>
      <marc:subfield code="e">author.</marc:subfield>
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    <marc:datafield tag="245" ind1="1" ind2="0">
      <marc:subfield code="a">Effects of nitrate on the acidification of the aquatic system / </marc:subfield>
      <marc:subfield code="c">F.C. Elder, Canada Centre for Inland Waters, Environment Canada.</marc:subfield>
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    <marc:datafield tag="264" ind1=" " ind2="1">
      <marc:subfield code="a">[Ottawa] : </marc:subfield>
      <marc:subfield code="b">[Environmental Protection Service], </marc:subfield>
      <marc:subfield code="c">1984.</marc:subfield>
    </marc:datafield>
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      <marc:subfield code="c">©1984</marc:subfield>
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      <marc:subfield code="b">illustrations.</marc:subfield>
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      <marc:subfield code="a">text</marc:subfield>
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      <marc:subfield code="a">computer</marc:subfield>
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      <marc:subfield code="a">online resource</marc:subfield>
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      <marc:subfield code="a">[Environmental Protection Service report series]</marc:subfield>
    </marc:datafield>
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      <marc:subfield code="a">Issued also in French under title: Effets du nitrate sur l'acidification du milieu aquatique.</marc:subfield>
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      <marc:subfield code="a">"Report EPS 2/TS/1, April 1984."</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">Includes bibliographical references.</marc:subfield>
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      <marc:subfield code="a">Acid pollution of rivers, lakes, etc.</marc:subfield>
      <marc:subfield code="z">Ontario.</marc:subfield>
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    <marc:datafield tag="650" ind1=" " ind2="0">
      <marc:subfield code="a">Nitrates</marc:subfield>
      <marc:subfield code="x">Environmental aspects</marc:subfield>
      <marc:subfield code="z">Ontario.</marc:subfield>
    </marc:datafield>
    <marc:datafield tag="650" ind1=" " ind2="0">
      <marc:subfield code="a">Acid pollution of rivers, lakes, etc.</marc:subfield>
      <marc:subfield code="z">Québec (Province)</marc:subfield>
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    <marc:datafield tag="650" ind1=" " ind2="0">
      <marc:subfield code="a">Nitrates</marc:subfield>
      <marc:subfield code="x">Environmental aspects</marc:subfield>
      <marc:subfield code="z">Québec (Province)</marc:subfield>
    </marc:datafield>
    <marc:datafield tag="650" ind1=" " ind2="0">
      <marc:subfield code="a">Acid pollution of rivers, lakes, etc.</marc:subfield>
      <marc:subfield code="z">New York (State)</marc:subfield>
    </marc:datafield>
    <marc:datafield tag="650" ind1=" " ind2="0">
      <marc:subfield code="a">Nitrates</marc:subfield>
      <marc:subfield code="x">Environmental aspects</marc:subfield>
      <marc:subfield code="z">New York (State)</marc:subfield>
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    <marc:datafield tag="710" ind1="1" ind2=" ">
      <marc:subfield code="a">Canada. </marc:subfield>
      <marc:subfield code="b">Environmental Protection Service, </marc:subfield>
      <marc:subfield code="e">issuing body.</marc:subfield>
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    <marc:datafield tag="775" ind1="0" ind2="8">
      <marc:subfield code="t">Effets du nitrate sur l'acidification du milieu aquatique / </marc:subfield>
      <marc:subfield code="w">(CaOODSP)9.939859</marc:subfield>
    </marc:datafield>
    <marc:datafield tag="830" ind1="#" ind2="0">
      <marc:subfield code="a">Environmental Protection Service report series.</marc:subfield>
      <marc:subfield code="w">(CaOODSP)9.866031</marc:subfield>
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      <marc:subfield code="q">PDF</marc:subfield>
      <marc:subfield code="s">349 KB</marc:subfield>
      <marc:subfield code="u">https://publications.gc.ca/collections/collection_2024/eccc/en42/En42-1-0-2-1-eng.pdf</marc:subfield>
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