Pinheiro, Carlos E., Agarb Cezar de Carvalho, Bernardo Gonzalez Vono, and Astrid Zaramella. 1965. “Preliminary Study on the Fluor Content of the Waters of the Region of Pereiras (State of São Pau10, Brasil)”. Revista Do Instituto De Medicina Tropical De São Paulo 7 (4): 228-32. https://revistas.usp.br/rimtsp/article/view/202103.