@misc{234511,
  author = {Dean Ripple and Paul DeRose},
  title = {Primary Determination of Particle Number Concentration with Light Obscuration and Dynamic Imaging Particle Counters},
  year = {2018},
  number = {123},
  month = {2018-01-11},
  publisher = {Journal of Research (NIST JRES), National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/jres.123.002},
  language = {en},
}