Araújo, E.S. de et al. 2003. Morphological and molecular traits and accumulation of grain protein in rice varieties from Maranhão, Brazil. Pesquisa Agropecuaria Brasileira. 38, 11 (Nov. 2003), 1281–1288. DOI:https://doi.org/10.1590/S1678-3921.pab2003.v38.6701.