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  1. 1
    出版 1949
    “...QC 851 .N988...”
    杂志
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    News letter = Nuusbrief.
  2. 2
    出版 1880
    “...QC 811 .M1962 1851...”
    图书
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    Observations made at the magnetical and meteorological observatory at the Cape of Good Hope.

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