TY  - RPRT
TI  - Combined drives in learning.
AU  - D RETHLINGSHAFER
AU  - A ESCHENBACH
AU  - J T STONE
PY  - 1951
DO  - 10.1037/h0063164
UR  - https://pubmed.ncbi.nlm.nih.gov/14841334/
ID  - 14841334
ER  -