Souto, S.M. and Franco, A.A. 2014. Leaf symptoms of macronutrient deficiencies in two tropical forage legumes. Pesquisa Agropecuaria Brasileira. 7, 1 (Apr. 2014), 23–27. DOI:https://doi.org/10.1590/S1678-3921.pab1972.v7.17411.