@misc{indiciae201aaf7254c8,
  title = {Extrinsic allergic pneumonias.},
  author = {D P Nicholson},
  year = {1972},
  doi = {10.1016/0002-9343(72)90123-4},
  url = {https://pubmed.ncbi.nlm.nih.gov/4559147/},
  note = {Source identifier: 4559147}
}