Ishak, R. ., Cardoso, D. das D. de P. ., & Fernandes, O. de F. L. . (1981). Prevalence of rubella antibodies in a female population sample, including pregnant women, in Goiânia, Goiás State, Brazil. Revista Do Instituto De Medicina Tropical De São Paulo, 23(4), 139-142. https://revistas.usp.br/rimtsp/article/view/197187