TY  - RPRT
TI  - Age differences in primary mental ability factors.
AU  - J L Horn
AU  - R B Cattell
PY  - 1966
DO  - 10.1093/geronj/21.2.210
UR  - https://pubmed.ncbi.nlm.nih.gov/5930515/
ID  - 5930515
ER  -