@misc{indiciae136754655a63,
  title = {Pulley exercise frame.},
  author = {H Z KRAVIS and L H BURL},
  year = {1957},
  doi = {10.1093/ptj/37.4.226},
  url = {https://pubmed.ncbi.nlm.nih.gov/13419514/},
  note = {Source identifier: 13419514}
}