@misc{188691,
  author = {John Beers and William Penzes},
  title = {The NIST Length Scale Interferometer},
  year = {1999},
  number = {104 No. 3},
  month = {1999-07-23},
  publisher = {Journal of Research (NIST JRES), National Institute of Standards and Technology, Gaithersburg, MD},
  language = {en},
}