TY  - RPRT
TI  - Reliability of headache questionnaire data.
AU  - J K Thompson
AU  - F L Collins
PY  - 1979
DO  - 10.1111/j.1526-4610.1979.hed1902097.x
UR  - https://pubmed.ncbi.nlm.nih.gov/422354/
ID  - 422354
ER  -