@misc{indiciaeda4a474f0b33,
  title = {[Apparative possibilities for hearing improvement].},
  author = {G Beckmann},
  year = {1970},
  doi = {10.1055/s-0028-1108805},
  url = {https://pubmed.ncbi.nlm.nih.gov/5477964/},
  note = {Source identifier: 5477964}
}