@article{9655,
  author = {C. Opal and Earl Beaty and W. Peterson},
  title = {Tables of secondary-electron-production cross sections},
  year = {1972},
  journal = {Atomic Data and Nuclear Data Tables},
  volume = {4},
  pages = {209-253},
  month = {Jan-03-1972},
  issn = {0092640X},
  doi = {10.1016/S0092-640X(72)80004-4},
}