@misc{1150636,
  author = {T A Siewert and A Tomer},
  title = {Microstructure, composition, and hardness of Rockwell C Hardness blocks:},
  year = {1991},
  month = {1991-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NIST.IR.3960},
  language = {en},
}