@misc{indiciae3c40ca4bf793,
  title = {Chronic bronchitis in farmers.},
  author = {E Melbostad and W Eduard and P Magnus},
  year = {1997},
  doi = {10.5271/sjweh.220},
  url = {https://pubmed.ncbi.nlm.nih.gov/9322818/},
  note = {Source identifier: 9322818}
}