TY  - RPRT
TI  - Vasoatonic headache associated with chronic maxillary sinusitis.
AU  - H L Williams
PY  - 1968
DO  - 10.1001/archotol.1968.00770010097019
UR  - https://pubmed.ncbi.nlm.nih.gov/4173390/
ID  - 4173390
ER  -