TY  - RPRT
TI  - Eustachian tube function and mastoid pneumatization.
AU  - S Shimada
AU  - N Yamaguchi
AU  - Y Honda
PY  - 1990
DO  - 10.3109/00016489009124809
UR  - https://pubmed.ncbi.nlm.nih.gov/2239248/
ID  - 2239248
ER  -