@misc{indiciaedb50dea4a6ba,
  title = {[Spirostat, a new portable spirometer (author's transl)].},
  author = {W H Heiss and D Zeidler},
  year = {1974},
  url = {https://pubmed.ncbi.nlm.nih.gov/4457851/},
  note = {Source identifier: 4457851}
}