@misc{indiciaef5191e22e59a,
  title = {A response key for use with projection-type display units.},
  author = {C B Ferster and E P Holtzman and W R Leckrone},
  year = {1962},
  doi = {10.1901/jeab.1962.5-322},
  url = {https://pubmed.ncbi.nlm.nih.gov/16811270/},
  note = {Source identifier: 16811270}
}