@misc{indiciae8df2d4c7c2fb,
  title = {Sinus radiography self-test.},
  author = {S G Harner},
  year = {1981},
  doi = {10.1080/00325481.1981.11715908},
  url = {https://pubmed.ncbi.nlm.nih.gov/7301658/},
  note = {Source identifier: 7301658}
}