@article{9610,
  author = {R. Tuggle and I. Iben},
  title = {On the Location of Pulsational Blue Edges and Estimates of the Luminosity and Helium Content of RR Lyrae Stars},
  year = {1972},
  journal = {Astrophysical Journal},
  volume = {178},
  chapter = {455},
  pages = {455-465},
  month = {12/1972},
  url = {http://adsabs.harvard.edu/full/1972ApJ...178..455T},
  note = {<p>JILA Pub. 928</p>},
}