@misc{indiciae856a087964eb,
  title = {Perspective on an altitude problem.},
  author = {M Landowne},
  year = {1969},
  doi = {10.1056/nejm196901232800410},
  url = {https://pubmed.ncbi.nlm.nih.gov/5782722/},
  note = {Source identifier: 5782722}
}