@article{9422,
  author = {D. Heddle},
  title = {Tables of Focal Properties of Three-element Electrostatic Cylinder Lenses},
  year = {1970},
  number = {104},
  pages = {1-82},
  month = {1970-10-15},
  address = {Boulder},
  issn = {104},
  note = {JILA Pub. 707},
}