@article{58761,
  author = {V French and R Powell and Douglas Blackburn and David Cranmer},
  title = {REFRACTIVE-INDEX GRATINGS IN RARE-EARTH-DOPED ALKALINE-EARTH GLASSES},
  year = {1991},
  number = {69},
  month = {1991-01-15},
  publisher = {Journal of Applied Physics},
  language = {en},
}