@misc{indiciae63c30552de97,
  title = {Internal and external validity in two studies that compared treatment methods.},
  author = {J A Gliner},
  year = {1989},
  doi = {10.5014/ajot.43.6.403},
  url = {https://pubmed.ncbi.nlm.nih.gov/2741999/},
  note = {Source identifier: 2741999}
}