TY  - RPRT
TI  - Speaking tubes for bedside use.
AU  - M Armstrong
AU  - P L Efros
PY  - 1996
DO  - 10.1016/s0194-5998(96)70020-7
UR  - https://pubmed.ncbi.nlm.nih.gov/8969770/
ID  - 8969770
ER  -