@misc{indiciae993135707484,
  title = {New aids for instruction.},
  author = {M K Beyrer},
  year = {1974},
  doi = {10.1111/j.1746-1561.1974.tb05212.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/4589441/},
  note = {Source identifier: 4589441}
}