Biogeochemical characteristics of organic matter in the particulate and colloidal fractions downstream of the rio Negro and Solimoes rivers confluence François Gadel, Léon Serve, Marc Benedetti, Leticia Cotrim da Cunha and Jean-Louis BlaziAgronomie, 20 5 (2000) 477-490DOI: https://doi.org/10.1051/agro:2000143
