Search Results       Your search for [subject]Humic acid -- Congresses returned 1 record.           Humic substances in the aquatic and terrestial environment. by Allard, B.; Berlin: Springer-Verlag, 1991. Subject: Humic acid -- Congresses; Humic acid -- Derivatives -- Congresses; Humic acid -- Derivatives -- Environmental.          Add to Book Cart Relevance: 26.29%