@misc{indiciaeec9017f4078b,
  title = {Concept learning in hyperactive and normal children.},
  author = {V Freibergs and V I Douglas},
  year = {1969},
  doi = {10.1037/h0027601},
  url = {https://pubmed.ncbi.nlm.nih.gov/5805741/},
  note = {Source identifier: 5805741}
}