@misc{indiciae20128878f90d,
  title = {New instructional materials.},
  author = {M K Beyrer},
  year = {1971},
  doi = {10.1111/j.1746-1561.1971.tb05124.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/4944324/},
  note = {Source identifier: 4944324}
}