@misc{indiciae072283b5d6e8,
  title = {Notes on regression in groups.},
  author = {S L Block},
  year = {1969},
  doi = {10.1016/0010-440x(69)90019-4},
  url = {https://pubmed.ncbi.nlm.nih.gov/5774549/},
  note = {Source identifier: 5774549}
}