@misc{indiciae4680b4f73f12,
  title = {Problems for families vs. problem families.},
  author = {M G Kint},
  year = {1977},
  doi = {10.1093/schbul/3.3.355},
  url = {https://pubmed.ncbi.nlm.nih.gov/918569/},
  note = {Source identifier: 918569}
}