@misc{indiciae1b7f5af288ac,
  title = {Letter: SI Units.},
  author = {N W Ramsey},
  year = {1974},
  doi = {10.1259/0007-1285-47-563-821-b},
  url = {https://pubmed.ncbi.nlm.nih.gov/4434010/},
  note = {Source identifier: 4434010}
}