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      <marc:subfield code="a">Canada. </marc:subfield>
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      <marc:subfield code="b">Science and Technology Branch.</marc:subfield>
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      <marc:subfield code="a">Biological test method - test for survival and growth in sediment and water using the freshwater amphipod Hyalella azteca / </marc:subfield>
      <marc:subfield code="h">[electronic resource]</marc:subfield>
      <marc:subfield code="c">[published by the] Method Development and Applications Unit. </marc:subfield>
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      <marc:subfield code="a">Second edition</marc:subfield>
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      <marc:subfield code="a">Ottawa - Ontario : </marc:subfield>
      <marc:subfield code="b">Environment Canada. </marc:subfield>
      <marc:subfield code="c">January 2013.</marc:subfield>
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      <marc:subfield code="a">Revised methods now recommended by Environment Canada for performing sediment and water-only toxicity tests using the freshwater amphipod Hyalella azteca are described in this report.</marc:subfield>
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      <marc:subfield code="a">(Résumé en français).</marc:subfield>
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      <marc:subfield code="t">Méthode d'essai biologique - essai de survie et de croissance de l'amphipode dulcicole Hyalella azteca dans les sédiments et l'eau / </marc:subfield>
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      <marc:subfield code="t">Biological test method - test for survival and growth in sediment and water using the freshwater amphipod Hyalella azteca </marc:subfield>
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      <marc:subfield code="a">Environmental Protection series. [Reference methods]</marc:subfield>
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      <marc:subfield code="a">http://publications.gc.ca</marc:subfield>
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      <marc:subfield code="u">https://publications.gc.ca/collections/collection_2013/ec/En49-7-1-33-eng.pdf</marc:subfield>
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