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      <marc:subfield code="a">Assessing and controlling toxic substances.</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">Poisons</marc:subfield>
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      <marc:subfield code="a">Poisons</marc:subfield>
      <marc:subfield code="z">Canada</marc:subfield>
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      <marc:subfield code="e">issuing body.</marc:subfield>
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      <marc:subfield code="q">PDF</marc:subfield>
      <marc:subfield code="s">3.26 MB</marc:subfield>
      <marc:subfield code="u">https://publications.gc.ca/collections/collection_2025/eccc/en40/En40-1060-1988-eng.pdf</marc:subfield>
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