@misc{1158851,
  author = {Robert M Graham and Jeff C Gust},
  title = {NIST recommended practice guide ::stopwatch and timer calibrations (2009 edition)/},
  year = {2009},
  month = {2009-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.SP.960-12e2},
  language = {en},
}