Demattê, J.A.M. et al. 2004. Comparison between soil maps obtained by spectral remote sensing and conventional method. Pesquisa Agropecuaria Brasileira. 39, 12 (Dec. 2004), 1219–1229. DOI:https://doi.org/10.1590/S1678-3921.pab2004.v39.6899.