@misc{indiciae5bb1e80e0b4b,
  title = {A comparison of group-centered and individual-centered activity programs.},
  author = {H Y EFRON and H K MARKS and R HALL},
  year = {1959},
  doi = {10.1001/archpsyc.1959.03590050120015},
  url = {https://pubmed.ncbi.nlm.nih.gov/13819488/},
  note = {Source identifier: 13819488}
}