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1Sraithuimhir
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2LEABHARFoilsithe / Cruthaithe 1973“…University of Texas at Austin. Center for Research in Water Resources…”
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3LEABHARFoilsithe / Cruthaithe 1974“…University of Texas at Austin. Center for Research in Water Resources…”
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4LEABHARFoilsithe / Cruthaithe 1984“…University of Texas at Austin. Center for Research in Water Resources…”