TY  - RPRT
TI  - Custom-molded earplug performance: a retrospective study.
AU  - C R Smith
AU  - J N Wilmoth
AU  - T E Borton
PY  - 1980
DO  - 10.3109/01050398009076344
UR  - https://pubmed.ncbi.nlm.nih.gov/7444324/
ID  - 7444324
ER  -