TY  - RPRT
TI  - Maximum phonation time and air usage during phonation. Clinical study.
AU  - M Hirano
AU  - Y Koike
AU  - H Von Leden
PY  - 1968
DO  - 10.1159/000263198
UR  - https://pubmed.ncbi.nlm.nih.gov/5671971/
ID  - 5671971
ER  -