@misc{indiciaea1b980dab74e,
  title = {[A method of x-ray pulmonary function test].},
  author = {K P Gerhardt and U Butter and S Gursky and D Tietze},
  year = {1966},
  url = {https://pubmed.ncbi.nlm.nih.gov/6011972/},
  note = {Source identifier: 6011972}
}