@misc{173491,
  author = {Yoshihiro Ohno},
  title = {Improved Photometric Standards and Calibration Procedures at NIST},
  year = {1997},
  number = {102 No. 3},
  month = {1997-05-01},
  publisher = {Journal of Research (NIST JRES), National Institute of Standards and Technology, Gaithersburg, MD},
  language = {en},
}