TY  - RPRT
TI  - A vernier caliper for interpreting electrocardiograms.
AU  - H R WAINERDI
AU  - J STEWART
PY  - 1950
DO  - 10.1056/nejm195002092420605
UR  - https://pubmed.ncbi.nlm.nih.gov/15403341/
ID  - 15403341
ER  -