@misc{indiciaeb5cc5bfaaff3,
  title = {Total unsharpness in radiography.},
  author = {M J Day},
  year = {1977},
  doi = {10.1088/0031-9155/22/3/017},
  url = {https://pubmed.ncbi.nlm.nih.gov/866421/},
  note = {Source identifier: 866421}
}