Porto, Antônio Vicente L., Dartanhan Baltez Figueiredo, and Paulo Roberto Magnago. “The Production of Instrutional Material and the Integration With the High School System: Situation and Perpectives”. Ciência e Natura 14, no. 14 (December 14, 1992): 133–138. Accessed December 1, 2024. https://periodicos.ufsm.br/cienciaenatura/article/view/26353.