@misc{indiciae76bdc382c6f1,
  title = {A practical electrocardiograph.},
  author = {J B Donald},
  year = {1972},
  doi = {10.1136/bmj.1.5802.751-c},
  url = {https://pubmed.ncbi.nlm.nih.gov/5015342/},
  note = {Source identifier: 5015342}
}