@misc{indiciaed83f3fbc3779,
  title = {Pulmonary function differences in normal smoking and nonsmoking, middle-aged, white-collar workers.},
  author = {R A Krumholz and E C Hedrick},
  year = {1973},
  doi = {10.1164/arrd.1973.107.2.225},
  url = {https://pubmed.ncbi.nlm.nih.gov/4683580/},
  note = {Source identifier: 4683580}
}