@misc{1153671,
  author = {David Garvin},
  title = {Subroutine for the calculation of CODEN check characters:},
  year = {1972},
  month = {1972-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.TN.738},
  language = {en},
}