TY  - RPRT
TI  - The Doser external counting device.
AU  - D M Williams
AU  - A Wessell
AU  - T P Brock
PY  - 1999
DO  - 10.1378/chest.116.5.1499
UR  - https://pubmed.ncbi.nlm.nih.gov/10559131/
ID  - 10559131
ER  -