@misc{1162846,
  author = {R W Seward},
  title = {NBS standard reference materials catalog 1988-89:},
  year = {1988},
  month = {1988-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.SP.260e1988},
  language = {en},
}