@misc{indiciae620603d8bdd8,
  title = {Miniature implantable sonomicrometer system.},
  author = {R D Lee and H Sandler},
  year = {1970},
  doi = {10.1152/jappl.1970.28.1.110},
  url = {https://pubmed.ncbi.nlm.nih.gov/5409780/},
  note = {Source identifier: 5409780}
}