@misc{indiciaed82fea66e4cd,
  title = {Less than 20 per cent oxygen or not?},
  author = {M D Vickers and E A Pask},
  year = {1966},
  doi = {10.1111/j.1365-2044.1966.tb02610.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/5956579/},
  note = {Source identifier: 5956579}
}