TY  - RPRT
TI  - [Standardization of the peak expiratory flow rate].
AU  - R Lang
AU  - H Kaufman
AU  - A Rieben
DO  - 10.1007/bf01997997
UR  - https://pubmed.ncbi.nlm.nih.gov/1236708/
ID  - 1236708
ER  -