@misc{indiciaec94b23364c83,
  title = {Improved routine chest radiography with a trough filter.},
  author = {S Wieder and P L Adams},
  year = {1981},
  doi = {10.2214/ajr.137.4.695},
  url = {https://pubmed.ncbi.nlm.nih.gov/6974962/},
  note = {Source identifier: 6974962}
}