@article{5192,
  author = {M. Kohl and Judah Levine},
  title = {Measuring low frequency tilts},
  year = {1993},
  journal = {Journal of Research of the National Institute of Standards and Technology},
  volume = {98},
  chapter = {191},
  url = {http://www.archive.org/details/jresv98n2p191},
  note = {JILA Pub. 4992},
}