@misc{1173641,
  author = {Arthur Hockman},
  title = {Letter Circular 1010::physical properties of currently produced marbles},
  year = {1953},
  month = {1953-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.LCIRC.1010},
  language = {en},
}