@conference{479,
  author = {J. Shull},
  title = {Intergalactic He II absorption at redshifts z = 2.3-2.9: FUSE Observations and theory},
  year = {2001},
  publisher = {Frontier Group},
  isbn = {ISBN-10: 2914601026 ISBN-13: 978-2914601023},
  note = {JILA Pub. 6751},
}