@misc{indiciae15d7122ebb4b,
  title = {Mixed group validation: a critique.},
  author = {E Alf and N M Abrahams},
  year = {1967},
  doi = {10.1037/h0024551},
  url = {https://pubmed.ncbi.nlm.nih.gov/6046736/},
  note = {Source identifier: 6046736}
}