TY  - RPRT
TI  - Implanted cardiac pacemakers of variable frequency.
AU  - G J HAUPT
AU  - R N MYERS
AU  - J W DALY
AU  - N C BIRKHEAD
PY  - 1963
DO  - 10.1001/jama.1963.03060020047020
UR  - https://pubmed.ncbi.nlm.nih.gov/13961005/
ID  - 13961005
ER  -