TY  - RPRT
TI  - Simple apparatus to measure eustachian tube function.
AU  - E Bortnick
PY  - 1966
DO  - 10.1001/archotol.1966.00760020014006
UR  - https://pubmed.ncbi.nlm.nih.gov/5900430/
ID  - 5900430
ER  -