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  1. 1
    Published 1961
    “...QC 801.3 .E96 1961...”
    Conference Proceeding Book
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    Résultats scientifiques.
  2. 2
    Published 1963
    “...QC 971.7 .A6 .E96...”
    Conference Proceeding Book
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    Observations aurorales à la Base Roi Baudouin /

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