@conference{8521,
  author = {A. Jain},
  title = {Positron scattering by NH3 and H2O molecules below positronium formation threshold},
  year = {1986},
  publisher = {World Scientific Pub Co Inc},
  isbn = {ISBN-10: 9971978970 ISBN-13: 978-9971978976},
  note = {JILA Pub. 3148},
}