@misc{1163386,
  author = {Samir El-Sabban and B W Mangum},
  title = {Standard Reference Materials ::SRM 1970 /},
  year = {1986},
  month = {1986-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.SP.260-101},
  language = {en},
}