The Fetal Electrocardiogram. Iv. Unusual Variations in the Qrs Complex during Labor.

@article{Lee1965TheFE,
  title={The Fetal Electrocardiogram. Iv. Unusual Variations in the Qrs Complex during Labor.},
  author={S. Todd Lee and Edward H. Hon},
  journal={American journal of obstetrics and gynecology},
  year={1965},
  volume={92},
  pages={1140-8}
}