@misc{indiciae24ce4764f085,
  title = {A self-testing device as an aid to learning.},
  author = {D Levinson},
  year = {1970},
  doi = {10.1111/j.1365-2923.1970.tb01607.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/5485768/},
  note = {Source identifier: 5485768}
}