SCHAD, R. T.; ERVIN, R. T. Production of Cash Market Grain Sorghum Versus Contracting Hybrid Seed. Texas Journal of Agriculture and Natural Resources, [S. l.], v. 1, p. 8–10, 2016. Disponível em: https://txjanr.agintexas.org/index.php/txjanr/article/view/321. Acesso em: 26 apr. 2024.