TY  - RPRT
TI  - Assessment of lung function using an air-flow meter.
AU  - M Friedman
AU  - S Walker
PY  - 1975
DO  - 10.1016/s0140-6736(75)91212-x
UR  - https://pubmed.ncbi.nlm.nih.gov/46450/
ID  - 46450
ER  -