@misc{indiciae1f3e6f10bfbd,
  title = {The abnormally large frontal sinus. I. A practical method for its determination based upon an analysis of 100 normal patients.},
  author = {M L Urken and P M Som and W Lawson and D Edelstein and G McAvay and H F Biller},
  year = {1987},
  url = {https://pubmed.ncbi.nlm.nih.gov/3573908/},
  note = {Source identifier: 3573908}
}