@misc{indiciae419175bfdcee,
  title = {Difficulty scaling of recognition items.},
  author = {E E Cureton},
  year = {1967},
  doi = {10.1007/bf02289426},
  url = {https://pubmed.ncbi.nlm.nih.gov/5233041/},
  note = {Source identifier: 5233041}
}