@misc{indiciaeb5376de0e79e,
  title = {The plural umbrella.},
  author = {S Vaisrub},
  year = {1978},
  doi = {10.1378/chest.74.6.614},
  url = {https://pubmed.ncbi.nlm.nih.gov/738117/},
  note = {Source identifier: 738117}
}