A. K. . Batista Martins, A. AMARO DE LIMA, M. . Gomes de Souza, and I. F. . Oliveira Bezerra, “Analysis of the basic sanitation system of black land earth in Manacapuru-Am”, Int J Innov Educ Res, vol. 7, no. 11, pp. 122–132, Nov. 2019, doi: 10.31686/ijier.vol7.iss11.1863.