@misc{indiciae21d980c5d20a,
  title = {AN EIGHT-DIFFICULTY-LEVEL DISCRIMINATION PROBLEM.},
  author = {W A KENNEDY and H C WILLCUTT},
  year = {1965},
  doi = {10.2466/pms.1965.20.1.26},
  url = {https://pubmed.ncbi.nlm.nih.gov/14286533/},
  note = {Source identifier: 14286533}
}