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      <marc:subfield code="a">An analysis of smoke observations in Winnipeg / </marc:subfield>
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      <marc:subfield code="a">"This paper discusses smokiness at the Winnipeg 149 River Oaks sampling station with regard to seasonal variation, diurnal variation and wind. The results are compared with those for the Winnipeg 320 Sherbrook Street sampling station"--Introduction, page [1].</marc:subfield>
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      <marc:subfield code="a">UDC: 551.510.42 : 551.588.7 : 551.556.4</marc:subfield>
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