@misc{indiciae01e4e3d638ca,
  title = {A simple acoustically coupled calibrator.},
  author = {K Martin},
  doi = {10.1016/0301-5629(83)90093-5},
  url = {https://pubmed.ncbi.nlm.nih.gov/6649158/},
  note = {Source identifier: 6649158}
}