@article{763726,
  author = {Douglas Franzen and M. Young and A. Cherin and E. Head and M. Hackert and K. Raine and J. Baines},
  title = {Numerical Aperture of Multimode Fibers by Several Methods: Resolving Differences},
  year = {1989},
  number = {LT-7},
  month = {1989-06-01 00:06:00},
  publisher = {Journal of Lightwave Technology},
  language = {en},
}