Silva PF, Oliveira F das C, Sousa RML, Lopes PD, Conceição IGC da, Paz GM da, et al. Availability of raw materials in the state of Piauí for the production of ceramic coating. Int J Innov Educ Res [Internet]. 2021 Apr. 1 [cited 2024 May 2];9(4):110-9. Available from: https://scholarsjournal.net/index.php/ijier/article/view/3025