TY  - RPRT
TI  - Pulmonary-function testing in children.
AU  - P D Sly
AU  - C F Robertson
PY  - 1989
DO  - 10.5694/j.1326-5377.1989.tb136766.x
UR  - https://pubmed.ncbi.nlm.nih.gov/2733619/
ID  - 2733619
ER  -