@article{9541,
  author = {C. Opal and Earl Beaty and W. Peterson},
  title = {Tables of Energy and Angular Distributions of Electrons Ejected from Simple Gases by Electron Impact},
  year = {1971},
  number = {108},
  pages = {1-122},
  month = {1971/05/26},
  address = {Boulder},
  issn = {108},
  note = {JILA Pub. 774},
}