@misc{indiciaedf59a837cba5,
  title = {Chronic bronchitis in rural population.},
  author = {S N Bhattacharyya and J K Bhatnagar and S Kumar and P C Jain},
  year = {1975},
  url = {https://pubmed.ncbi.nlm.nih.gov/1205541/},
  note = {Source identifier: 1205541}
}