Camara, Marcia Regina Gabardo, and Moisés Pais dos Santos. 1999. “Evolution of the Chemical Industry in Brazil-Performance Analysis of the Petrochemical Pole of Triunfo”. Semina: Ciências Sociais E Humanas 19 (3):35-49. https://doi.org/10.5433/1679-0383.1999v19n3p35.