@conference{7620,
  author = {J. Shull},
  title = {Non-equilibrium ionization X-ray emission from supernova remnants},
  year = {1983},
  publisher = {Dordrecht, D. Reidel Publishing Co.},
  address = {Venice, Italy},
  url = {http://adsabs.harvard.edu/full/1983IAUS..101...99S},
  note = {JILA Pub. 2601},
}