@misc{indiciae9e3dc3d480b5,
  title = {Airways obstruction, coal mining, and disability.},
  author = {N L Lapp and W K Morgan and G Zaldivar},
  year = {1994},
  doi = {10.1136/oem.51.4.234},
  url = {https://pubmed.ncbi.nlm.nih.gov/8199664/},
  note = {Source identifier: 8199664}
}