TY  - RPRT
TI  - REFLECTION ON THE PROBLEM OF HEADACHE.
AU  - A P FRIEDMAN
PY  - 1964
DO  - 10.1001/jama.1964.03070180043006
UR  - https://pubmed.ncbi.nlm.nih.gov/14197993/
ID  - 14197993
ER  -