@misc{indiciae3339e141371b,
  title = {Airways obstruction, coal mining, and disability.},
  author = {M Greenburg},
  year = {1994},
  doi = {10.1136/oem.51.12.841-a},
  url = {https://pubmed.ncbi.nlm.nih.gov/7849871/},
  note = {Source identifier: 7849871}
}