TY  - RPRT
TI  - A simple technique for pulmonary function testing in patients with permanent tracheostomies.
AU  - M S Benson
AU  - C K Carman
AU  - D J Pierson
PY  - 1986
UR  - https://pubmed.ncbi.nlm.nih.gov/10315713/
ID  - 10315713
ER  -