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1Foilsithe / Cruthaithe 1994Ábhair “...Soil erosion Research Methodology....”
LEABHAR -
2de réir Hill, Stephen A.Ábhair “...Plant viruses Research Methodology....”
Foilsithe / Cruthaithe 1984
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3
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4de réir Wolt, Jeffrey D.Ábhair “...Soil solutions Research Methodology....”
Foilsithe / Cruthaithe 1994
LEABHAR -
5Foilsithe / Cruthaithe 2005Ábhair “...Forest insects Research Methodology....”
LEABHAR