TY  - RPRT
TI  - NORMAL VARIATIONS IN RESPIRATORY AND CARDIOVASCULAR TESTING.
AU  - A W SEXTON
PY  - 1964
DO  - 10.1093/ptj/44.10.891
UR  - https://pubmed.ncbi.nlm.nih.gov/14217344/
ID  - 14217344
ER  -