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1
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2IRISFoilsithe / Cruthaithe 1971“…Illuminating Engineering Society (U.S.)…”
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3LEABHARFoilsithe / Cruthaithe 1959“…Illuminating Engineering Society (U.S.)…”
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4IRIS
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5LEABHARFoilsithe / Cruthaithe 1989“…Illuminating Engineering Society (U.S.). Committee on Sports and Recreational Areas…”