@misc{indiciaedb180b2d3423,
  title = {Electrocardiography: standards, techniques, and training.},
  author = {D M Krikler},
  year = {1971},
  doi = {10.1016/s0140-6736(71)91349-3},
  url = {https://pubmed.ncbi.nlm.nih.gov/4104991/},
  note = {Source identifier: 4104991}
}