@misc{indiciaee5b07b981a18,
  title = {The preferred layout for numeral data-entry keysets.},
  author = {R Conrad and A J Hull},
  year = {1968},
  doi = {10.1080/00140136808930953},
  url = {https://pubmed.ncbi.nlm.nih.gov/5648377/},
  note = {Source identifier: 5648377}
}