Kumada, K. (1987) Classification of Humic Acids. In Developments in Soil Science, Vol. 17, Elsevier, Amsterdam, 17-33. - References

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Kumada, K. (1987) Classification of Humic Acids. In: Developments in Soil Science, Vol. 17, Elsevier, Amsterdam, 17-33.
https://doi.org/10.1016/S0166-2481(08)70078-3

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