@misc{indiciae3487f3ae7025,
  title = {An audience response card.},
  author = {R M Harden},
  year = {1968},
  doi = {10.1111/j.1365-2923.1968.tb01774.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/5683562/},
  note = {Source identifier: 5683562}
}