Yokoiama, Lidia Pacheco, and Abel Ciro Minniti Igreja. 1992. “Main Crops in Middle-West Brazilian Region: A Study of Variations from 1975 to 1987”. Pesquisa Agropecuaria Brasileira 27 (5):727-36. https://doi.org/10.1590/S1678-3921.pab1992.v27.3704.