@misc{1149491,
  author = {T Robert Shives and John H Smith},
  title = {Intercomparison study of Rockwell hardness test 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.4531},
  language = {en},
}