@misc{indiciae3bb6e8c58d9b,
  title = {Operant analysis of encounter groups: a pilot study.},
  author = {K E Marshall and A D Colman},
  year = {1974},
  doi = {10.1080/00207284.1974.11492268},
  url = {https://pubmed.ncbi.nlm.nih.gov/4810412/},
  note = {Source identifier: 4810412}
}