@misc{indiciae406c7693ad9c,
  title = {Age differences in primary mental ability factors.},
  author = {J L Horn and R B Cattell},
  year = {1966},
  doi = {10.1093/geronj/21.2.210},
  url = {https://pubmed.ncbi.nlm.nih.gov/5930515/},
  note = {Source identifier: 5930515}
}