TY  - RPRT
TI  - Needs (Murray, 1938) and state-variables (Skinner, 1938).
AU  - P E Meehl
PY  - 1992
DO  - 10.2466/pr0.1992.70.2.407
UR  - https://pubmed.ncbi.nlm.nih.gov/1598366/
ID  - 1598366
ER  -