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      <marc:subfield code="a">Evans, Marlene S., </marc:subfield>
      <marc:subfield code="e">author.</marc:subfield>
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    <marc:datafield tag="245" ind1="1" ind2="4">
      <marc:subfield code="a">The limnology of Waskesiu Lake, Prince Albert National Park, Saskatchewan, July 1992 to October 1994 studies with historical comparisons / </marc:subfield>
      <marc:subfield code="c">Marlene S. Evans and Richard D. Robarts, National Water Research Institute.</marc:subfield>
    </marc:datafield>
    <marc:datafield tag="264" ind1=" " ind2="1">
      <marc:subfield code="a">Saskatoon, Saskatchewan : </marc:subfield>
      <marc:subfield code="b">National Hydrology Research Centre = Centre national de recherche en hydrologie, </marc:subfield>
      <marc:subfield code="c">1999.</marc:subfield>
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      <marc:subfield code="a">1 online resource (x, 144 pages) : </marc:subfield>
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      <marc:subfield code="a">NWRI contribution series; </marc:subfield>
      <marc:subfield code="v">no. 99-13</marc:subfield>
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    <marc:datafield tag="500" ind1=" " ind2=" ">
      <marc:subfield code="a">"May 1999."</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 (pages 72-75).</marc:subfield>
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      <marc:subfield code="a">"This report is based on an investigation of the open lake limnology of Waskesiu Lake, from July 1992 to October 1994. The overall objective of the study was to characterize factors affecting the trophic status of the lake and to assess whether trophic condition had changed from Rawson's pioneering studies conducted from the late 1920 to mid 1930s. Most sampling took place during the ice-free season: studies were conducted monthly from July to October 1992, monthly from July to October 1993, and biweekly from May to October 1994. Sampling also was conducted in January (1993) and March (1993 and 1994). One site was sampled in the lower lakes, offshore of Prospect Point (depth ca. 24 m); the second site was sampled in the upper lake offshore of the Third Narrows (depth ca. 11 m)"--Abstract, page i.</marc:subfield>
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      <marc:subfield code="a">Limnology</marc:subfield>
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      <marc:subfield code="a">Robarts, R. D. </marc:subfield>
      <marc:subfield code="q">(Richard D.)</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">National Hydrology Research Centre (Canada)</marc:subfield>
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      <marc:subfield code="a">National Water Research Institute (Canada)</marc:subfield>
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    <marc:datafield tag="830" ind1="#" ind2="0">
      <marc:subfield code="a">NWRI contribution ;</marc:subfield>
      <marc:subfield code="v">no. 99-13.</marc:subfield>
      <marc:subfield code="w">(CaOODSP)9.844121</marc:subfield>
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      <marc:subfield code="q">PDF</marc:subfield>
      <marc:subfield code="s">8.18 MB</marc:subfield>
      <marc:subfield code="u">https://publications.gc.ca/collections/collection_2019/eccc/en13-5/En13-5-99-13-eng.pdf</marc:subfield>
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