Interpreting the electrokymogram of heart and great vessel motion.

@article{BOONE1947InterpretingTE,
  title={Interpreting the electrokymogram of heart and great vessel motion.},
  author={B R BOONE and W. Edward Chamberlain},
  journal={American heart journal},
  year={1947},
  volume={34 4},
  pages={560-8}
}