TY  - RPRT
TI  - An introduction to biofeedback.
AU  - Martin H Astor
PY  - 1977
DO  - 10.1111/j.1939-0025.1977.tb01272.x
UR  - https://pubmed.ncbi.nlm.nih.gov/920786/
ID  - 920786
ER  -