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1Humification of plant materials: properties of humic acid extracts Humification of plant materials: properties of humic acid extractsby Swift, R.S., FAO, Vienna (Austria). Joint FAO/IAEA Div. of Atomic Energy in Food and Agriculture eng, Symposium on Soil Organic Matter Studies eng 6 Sep 1976 Braunschweig (Germany, F.R.), Posner, A.M.
Published JanTexto bibliotecaFAO IT