@misc{indiciae19c6281d60b2,
  title = {[A sampling plan for evaluation of vaccinal coverage].},
  author = {E P Silva and N Nakao and E Juarez},
  year = {1989},
  doi = {10.1590/s0034-89101989000200009},
  url = {https://pubmed.ncbi.nlm.nih.gov/2617107/},
  note = {Source identifier: 2617107}
}