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1Conference ProceedingArgitaratua 1935“...International Congress of Soil Science...”
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2Conference ProceedingArgitaratua 1928“...International Congress of Soil Science...”
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3Conference Proceeding LiburuaArgitaratua 1960“...International Congress of Soil Science Madison, Wis....”
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4Conference Proceeding LiburuaArgitaratua 1982“...International Congress of Soil Science New Delhi, India...”
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5Conference Proceeding LiburuaArgitaratua 1995“...International Congress of Soil Science...”