@misc{1162261,
  author = {Frances C Bell and Harold F Wollin},
  title = {Report of the 56th national conference on weights and measures 1971:},
  year = {1972},
  month = {1972-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.SP.358},
  language = {en},
}