TY  - RPRT
TI  - Operant therapy for headaches.
AU  - R S Fowler
PY  - 1975
DO  - 10.1111/j.1526-4610.1975.hed1501063.x
UR  - https://pubmed.ncbi.nlm.nih.gov/1132992/
ID  - 1132992
ER  -