@misc{indiciaeafd5a47d155a,
  title = {Chronic obstructive pulmonary disease. A review, emphasizing roentgen pathologic correlations.},
  author = {E R Heitzman and B Markarian and J Solomon},
  year = {1973},
  url = {https://pubmed.ncbi.nlm.nih.gov/4570724/},
  note = {Source identifier: 4570724}
}