Neto, José de Souza, Gregory A. Baker, and Francisco Beni de Sousa. 1995. “Socioeconomical Analysis of Goats and Sheep Exploitation in Piauí State, Brazil”. Pesquisa Agropecuaria Brasileira 30 (8):1017-30. https://doi.org/10.1590/S1678-3921.pab1995.v30.4392.