@misc{1186761,
  author = {R M Schoonover},
  title = {Notes on the preparation of silicon density artifacts:},
  year = {1976},
  month = {1976-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.IR.76-1019},
  language = {en},
}