TY  - RPRT
TI  - A simplified method for measuring helium closing volume.
AU  - K McClelland
AU  - C Mittman
PY  - 1975
DO  - 10.1378/chest.67.1.110
UR  - https://pubmed.ncbi.nlm.nih.gov/1235313/
ID  - 1235313
ER  -