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      <marc:subfield code="a">Nelms, G.L., </marc:subfield>
      <marc:subfield code="e">author.</marc:subfield>
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    <marc:datafield tag="245" ind1="1" ind2="4">
      <marc:subfield code="a">The polar ionosphere : </marc:subfield>
      <marc:subfield code="b">results from the Alouette/ISIS topside sounders / </marc:subfield>
      <marc:subfield code="c">by G.L. Nelms and J.H. Chapman.</marc:subfield>
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      <marc:subfield code="a">Ottawa, Canada : </marc:subfield>
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      <marc:subfield code="c">[1969]</marc:subfield>
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      <marc:subfield code="a">Digitized edition from print [produced by Innovation, Science and Economic Development Canada].</marc:subfield>
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      <marc:subfield code="a">Includes bibliographical refrences (pages [41-49]).</marc:subfield>
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      <marc:subfield code="a">"The results obtained from the sweep frequency topside sounder satellites are reviewed. Emphasis is given to high latitude phenomena, and to the possible relation of plasma flow in the magnetosphere to the ionospheric structures observed at high latitudes"--Abstract.</marc:subfield>
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      <marc:subfield code="a">Ionosphere</marc:subfield>
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      <marc:subfield code="a">Magnetosphere.</marc:subfield>
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      <marc:subfield code="a">Ionosphère</marc:subfield>
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      <marc:subfield code="a">Magnétosphère.</marc:subfield>
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      <marc:subfield code="a">Canada. </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/isde-ised/Co24-623-1969-eng.pdf</marc:subfield>
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