@misc{indiciaec319cc52b285,
  title = {Central lymph node changes and progressive massive fibrosis in coalworkers.},
  author = {R M Seal and A Cockcroft and I Kung and J C Wagner},
  year = {1986},
  doi = {10.1136/thx.41.7.531},
  url = {https://pubmed.ncbi.nlm.nih.gov/3787533/},
  note = {Source identifier: 3787533}
}