@misc{1173076,
  author = {James Jespersen and Jane Fitz-Randolph},
  title = {From sundials to atomic clocks ::understanding time and fluency},
  year = {1999},
  month = {1999-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.MONO.155e1999},
  language = {en},
}