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1Imeacht comhdhálaFoilsithe / Cruthaithe 1935“…International Congress of Soil Science…”
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2Imeacht comhdhálaFoilsithe / Cruthaithe 1928“…International Congress of Soil Science…”
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3Imeacht comhdhála LEABHARFoilsithe / Cruthaithe 1960“…International Congress of Soil Science Madison, Wis.…”
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4Imeacht comhdhála LEABHARFoilsithe / Cruthaithe 1982“…International Congress of Soil Science New Delhi, India…”
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5Imeacht comhdhála LEABHARFoilsithe / Cruthaithe 1995“…International Congress of Soil Science…”