TY  - RPRT
TI  - Methods of exercise testing. Step test, bicycle, treadmill, isometrics.
AU  - R A Bruce
PY  - 1974
DO  - 10.1016/0002-9149(74)90211-2
UR  - https://pubmed.ncbi.nlm.nih.gov/4824847/
ID  - 4824847
ER  -