@misc{indiciaeba785f4ee5fb,
  title = {New aids for instruction.},
  author = {M K Beyrer},
  year = {1973},
  doi = {10.1111/j.1746-1561.1973.tb03750.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/4126782/},
  note = {Source identifier: 4126782}
}