@misc{indiciae1051094868e6,
  title = {Mask design considerations.},
  author = {A T Johnson and E G Cummings},
  year = {1975},
  doi = {10.1080/0002889758507238},
  url = {https://pubmed.ncbi.nlm.nih.gov/1146686/},
  note = {Source identifier: 1146686}
}