TY  - GEN
AU  - ESTES,W K
TI  - Some reflections on the concept of secondary drive--a reply to Professor Mowrer
SN  - 0021-9940
PY  - 2004///0930
KW  - Conditioning, Psychological
KW  - Drive
N1  - Publication Type: Journal Article
UR  - https://doi.org/10.1037/h0061592
ER  -