[A new method of registering of the deflections P in electrocardiograms].

@article{Popova1956ANM,
  title={[A new method of registering of the deflections P in electrocardiograms].},
  author={A. I. Popova},
  journal={Klinicheskaia meditsina},
  year={1956},
  volume={34 2},
  pages={76-8}
}