TY  - RPRT
TI  - Maximum duration of phonation.
AU  - P H PTACEK
AU  - E K SANDER
PY  - 1963
DO  - 10.1044/jshd.2802.171
UR  - https://pubmed.ncbi.nlm.nih.gov/13972416/
ID  - 13972416
ER  -