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      <marc:subfield code="a">Grenier, A.</marc:subfield>
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      <marc:subfield code="a">Assessment of cleaning methods for electro-welded sieves to reduce/eliminate carry over contamination between till samples / </marc:subfield>
      <marc:subfield code="c">A. Grenier, S. Connell-Madore, M.B. McClenaghan, M. Wygergangs, and C.S. Moore.</marc:subfield>
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      <marc:subfield code="a">[Ottawa] : </marc:subfield>
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      <marc:subfield code="c">2015.</marc:subfield>
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      <marc:subfield code="a">Includes bibliographical references (pages 9-10).</marc:subfield>
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      <marc:subfield code="a">"The purpose of this study is to determine the effectiveness of commonly used cleaning methods at preventing cross contamination while sieving. This is critical to the quality of the geochemical analysis"--Abstract, page 1.</marc:subfield>
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      <marc:subfield code="a">Geological Survey of Canada, </marc:subfield>
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