@misc{indiciae1dc2f96ea674,
  title = {New aids for instruction.},
  author = {M K Beyrer},
  year = {1972},
  doi = {10.1111/j.1746-1561.1972.tb08059.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/4111796/},
  note = {Source identifier: 4111796}
}