TY  - RPRT
TI  - Clinical biofeedback: a behavioral analysis.
AU  - B T Engel
PY  - 1981
DO  - 10.1016/0149-7634(81)90034-8
UR  - https://pubmed.ncbi.nlm.nih.gov/7301226/
ID  - 7301226
ER  -