TY  - RPRT
TI  - Second-order personality factor structure in the objective test realm.
AU  - R B CATTELL
AU  - R R KNAPP
AU  - I H SCHEIER
PY  - 1961
DO  - 10.1037/h0048730
UR  - https://pubmed.ncbi.nlm.nih.gov/13691632/
ID  - 13691632
ER  -