@misc{indiciaea849e137a87c,
  title = {One facilitator, two PBL groups.},
  author = {J L Keller and D Burns},
  year = {1997},
  doi = {10.1097/00001888-199704000-00002},
  url = {https://pubmed.ncbi.nlm.nih.gov/9125933/},
  note = {Source identifier: 9125933}
}