@misc{indiciaecb530969fde2,
  title = {[Audiometer calibration in Poland].},
  author = {T Ceypek and J Kuźniarz and A Lipowczan},
  year = {1972},
  url = {https://pubmed.ncbi.nlm.nih.gov/5087216/},
  note = {Source identifier: 5087216}
}