TY  - RPRT
TI  - THE QUESTIONNAIRE: A TECHNIQUE FOR CLASSIFYING HEADACHE.
AU  - P S MACNEAL
PY  - 1964
DO  - 10.1111/j.1526-4610.1964.hed0401167.x
UR  - https://pubmed.ncbi.nlm.nih.gov/14139495/
ID  - 14139495
ER  -