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      <marc:subfield code="a">Potter, J. G., </marc:subfield>
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      <marc:subfield code="a">Diurnal and seasonal variation of low ceilings and visibilities at selected Canadian stations / </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">"Due to the novel presentation of the variation of low ceilings and visibilities on a diurnal basis, these summaries for Goose, Gander, Sydney, Montreal, and Winnipeg should be of particular interest to the meteorologists directly concerned with hazardous flying conditions at these airports. The method of summarizing these data is described to illustrate how similar summaries may be compiled for other airports in Canada"--Page [1].</marc:subfield>
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