TY  - RPRT
TI  - Pulmonary function testing: a practical guide to its use in pediatric practice.
AU  - H Eigen
PY  - 1986
DO  - 10.1542/pir.7-8-235
UR  - https://pubmed.ncbi.nlm.nih.gov/3331438/
ID  - 3331438
ER  -