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      <marc:subfield code="a">Indoor ventilation : </marc:subfield>
      <marc:subfield code="b">guidance during the COVID-19 pandemic.</marc:subfield>
    </marc:datafield>
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      <marc:subfield code="a">[Ottawa] : </marc:subfield>
      <marc:subfield code="b">Canadian Centre for Occupational Health and Safety, </marc:subfield>
      <marc:subfield code="c">[2023]</marc:subfield>
    </marc:datafield>
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      <marc:subfield code="a">1 online resource (4 unnumbered pages) : </marc:subfield>
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      <marc:subfield code="a">[COVID-19 health and safety resources]</marc:subfield>
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      <marc:subfield code="a">Caption title.</marc:subfield>
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      <marc:subfield code="a">Issued also in French under title: Ventilation intérieure : directives pendant la pandémie de COVID-19.</marc:subfield>
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      <marc:subfield code="a">"Understanding how indoor ventilation affects the spread of COVID-19 can help people in Canada make safe choices ... This tip sheet gives information and advice on indoor ventilation and how it relates to COVID-19. It also provides guidance to building owners and occupiers, workers, and visitors on ways to reduce the spread of infectious diseases which spread through the air, including COVID-19"--Introduction.</marc:subfield>
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      <marc:subfield code="a">Industrial hygiene</marc:subfield>
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      <marc:subfield code="a">Canadian Centre for Occupational Health and Safety, </marc:subfield>
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      <marc:subfield code="t">Ventilation intérieure : </marc:subfield>
      <marc:subfield code="w">(CaOODSP)9.926292</marc:subfield>
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      <marc:subfield code="a">COVID-19 health and safety resources.</marc:subfield>
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      <marc:subfield code="q">PDF</marc:subfield>
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      <marc:subfield code="u">https://publications.gc.ca/collections/collection_2023/cchst-ccohs/CC273-3-6-2023-eng.pdf</marc:subfield>
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      <marc:subfield code="q">HTML</marc:subfield>
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      <marc:subfield code="u">https://www.ccohs.ca/covid19/indoor-ventilation/</marc:subfield>
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