@misc{223721,
  author = {Georgia Harris and Val Miller},
  title = {NIST HB 105-4, Specifications and Tolerances for Reference Standards and Field Standard Weights and Measures 4. Specifications and Tolerances for Liquefied Petroleum Gas and Anhydrous Ammonia Liquid Volumetric Provers (2016 Ed)},
  year = {2016},
  month = {2016-12-14},
  publisher = {Handbook (NIST HB), National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NIST.HB.105-4-2016},
  language = {en},
}