@misc{indiciaea5309a8b3def,
  title = {The cardiac Work Classification Unit.},
  author = {R J CLARK and H B SPRAGUE and A THORNDIKE},
  year = {1952},
  doi = {10.1056/nejm195208212470807},
  url = {https://pubmed.ncbi.nlm.nih.gov/14947945/},
  note = {Source identifier: 14947945}
}