Passos, A. D., J. C. Cardoso, J. E. Paz, and E. E. Castilla. “ Socioeconomic Level As an Error Generating Variable in Racial Studies ”. Revista de Saúde Pública 12, no. 2 (June 1, 1978): 122–128. Accessed May 19, 2024. https://revistas.usp.br/rsp/article/view/22889.