[1]
V. Barbosa, K. E. Stewien, and C. P. Rosenburg, “ Relation of the vaccination status, housing and cultural level of the mother to the immune status to poliomyelitis in a sample of school children from the City of S. Paulo, Brazil ”, Rev. saúde pública, vol. 11, no. 3, pp. 330–337, Sep. 1977, doi: 10.1590/S0034-89101977000300004.