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Studies of the Compositions of Humic Acids from Amazonian Dark Earth Soils

✍ Scribed by Novotny, Etelvino H.; deAzevedo, Eduardo R.; Bonagamba, Tito J.; Cunha, Tony J. F.; Madari, Beáta E.; Benites, Vinícius de M.; Hayes,

No coin nor oath required. For personal study only.

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