@misc{indiciaef6335ad9728a,
  title = {Physical therapy in chronic bronchitis.},
  author = {D Newton},
  year = {1979},
  doi = {10.1136/bmj.1.6159.344-b},
  url = {https://pubmed.ncbi.nlm.nih.gov/369660/},
  note = {Source identifier: 369660}
}