@misc{indiciae4ce88be0bf52,
  title = {Pulmonary function differences in normal smoking and nonsmoking, middle-aged, white-collar workers.},
  author = {R A Krumholz and E C Hedrick},
  year = {1971},
  url = {https://pubmed.ncbi.nlm.nih.gov/5131838/},
  note = {Source identifier: 5131838}
}