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      <marc:subfield code="a">nl-----</marc:subfield>
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      <marc:subfield code="a">Atmospheric loading of the lower Great Lakes and the Great Lakes Drainage Basin / </marc:subfield>
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      <marc:subfield code="a">Burlington, Ontario : </marc:subfield>
      <marc:subfield code="b">Canada Centre for Inland Waters, </marc:subfield>
      <marc:subfield code="c">March 1977.</marc:subfield>
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      <marc:subfield code="a">1 online resource (70 pages, 20 unnumbered pages) : </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">"In this contract, model estimates were required for Lakes Michigan, Erie and Ontario, as well as for the entire land drainage area in the Great Lakes basin, subdivided, into 37 individual areas. Additional meteorological stations and emission regions to the east and southeast of Lake Ontario were added to the data file for estimating loadings on Lakes Erie and Ontario and their drainage areas"--Introduction, page [1].</marc:subfield>
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      <marc:subfield code="a">Eau</marc:subfield>
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      <marc:subfield code="a">Grands Lacs (Amérique du Nord)</marc:subfield>
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      <marc:subfield code="a">Canada. </marc:subfield>
      <marc:subfield code="b">Environment Canada.</marc:subfield>
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      <marc:subfield code="a">Canada Centre for Inland Waters.</marc:subfield>
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      <marc:subfield code="a">Acres Consulting Services.</marc:subfield>
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      <marc:subfield code="u">https://publications.gc.ca/collections/collection_2020/eccc/en39/En39-62-1977-eng.pdf</marc:subfield>
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