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1LEABHARFoilsithe / Cruthaithe 1982“…International Astronomical Union. Colloquium…”
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2LEABHARFoilsithe / Cruthaithe 1978“…International Astronomical Union. Colloquium…”
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3LEABHARFoilsithe / Cruthaithe 1977“…International Astronomical Union. Colloquium…”