@misc{indiciaeb8f8f4915c2f,
  title = {Letter Normal=10 +/- 2.},
  author = {B M Wright},
  year = {1975},
  doi = {10.1016/s0140-6736(75)92105-4},
  url = {https://pubmed.ncbi.nlm.nih.gov/53750/},
  note = {Source identifier: 53750}
}