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MOLECULAR WEIGHT DISTRIBUTION ANALYSIS BY GEL CHROMATOGRAPHY ON SEPHADEX
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THEORY OF GEL FILTRATION + ITS EXPERIMENTAL VERIFICATION
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Mehta N. C., 1963, Zeitschrift fur Pflanzenernahrung, Dungung und Bodenkunde, V102, P128, DOI 10.1002/jpln.19631020206
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HUMIC ACIDS EXTRACTED BY VARIOUS REAGENTS FROM A SOIL .I. YIELD INORGANIC COMPONENTS AND TITRATION CURVES
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