@misc{indiciae23d844b3c553,
  title = {Electron spectroscopy with monochromatized x-rays.},
  author = {K Siegbahn and D Hammond and H Fellner-Feldegg and E F Barnett},
  year = {1972},
  doi = {10.1126/science.176.4032.245},
  url = {https://pubmed.ncbi.nlm.nih.gov/5019777/},
  note = {Source identifier: 5019777}
}