@conference{4490,
  author = {D. Hillier},
  title = {Observational abundances of Wolf-Rayet stars},
  year = {1990},
  publisher = {San Francisco, CA, Astronomical Society of the Pacific},
  address = {Boulder, Colorado},
  url = {http://adsabs.harvard.edu/full/1990ASPC....7..340H},
  note = {JILA Pub. 4169},
}