@misc{indiciaed0c17026587f,
  title = {Hearing aids.},
  author = {R G Mackay and B A Skurb},
  year = {1968},
  doi = {10.5694/j.1326-5377.1968.tb27535.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/5641091/},
  note = {Source identifier: 5641091}
}