@misc{indiciae939caf63d1cf,
  title = {Focal spot sizes.},
  author = {F H KEMP and A F NICHOLS},
  year = {1958},
  doi = {10.1259/0007-1285-31-369-486},
  url = {https://pubmed.ncbi.nlm.nih.gov/13572801/},
  note = {Source identifier: 13572801}
}