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      <marc:subfield code="a">National Air Pollution Surveillance (NAPS), a comparison of 1978 NAPS network data with national air quality objectives = </marc:subfield>
      <marc:subfield code="b">Surveillance nationale de la pollution atmosphérique (NSPA), comparaison des données de 1978 du Réseau NSPA avec les objectifs nationaux de la qualité de l'air.</marc:subfield>
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      <marc:subfield code="a">Surveillance nationale de la pollution atmosphérique (NSPA), comparaison des données de 1978 du Réseau NSPA avec les objectifs nationaux de la qualité de l'air</marc:subfield>
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      <marc:subfield code="c">August 1980.</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">Air</marc:subfield>
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      <marc:subfield code="x">Measurement.</marc:subfield>
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      <marc:subfield code="b">Air Pollution Control Directorate, </marc:subfield>
      <marc:subfield code="e">issuing body.</marc:subfield>
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      <marc:subfield code="t">National Air Pollution Surveillance (NAPS), a comparison of 1978 NAPS network data with national air quality objectives = </marc:subfield>
      <marc:subfield code="e">fre</marc:subfield>
      <marc:subfield code="w">(CaOODSP)9.925399</marc:subfield>
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      <marc:subfield code="q">PDF</marc:subfield>
      <marc:subfield code="s">810 KB</marc:subfield>
      <marc:subfield code="u">https://publications.gc.ca/collections/collection_2023/eccc/En41-22-1980.pdf</marc:subfield>
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