@misc{indiciae22a26baf2f8f,
  title = {Parameters affecting radiographic contrast.},
  author = {N L Frederiksen and P W Goaz},
  year = {1990},
  doi = {10.1259/dmfr.19.4.2097228},
  url = {https://pubmed.ncbi.nlm.nih.gov/2097228/},
  note = {Source identifier: 2097228}
}