@inproceedings{inproceedingsabc4b2d1,
title   = {Studies of the compositions of humic acids from amazonian dark earth soils},
author = {Novotny, Etelvino Henrique and Hayes, Michael Hilary Bermingham and Azevêdo, Eduardo Ribeiro de and Benites, Vinicius de Melo and Madari, Beata Emoke and Cunha, Tony J. F. and Bonagamba, Tito José},
year = {2006},
booktitle   = {Meeting of the International Humic Substances Society}
}