@misc{indiciae1ffb9261e743,
  title = {Transducer beam pattern test object.},
  author = {L V Hefner and J A Parks and A Goldstein},
  year = {1980},
  doi = {10.1002/jcu.1870080103},
  url = {https://pubmed.ncbi.nlm.nih.gov/6766478/},
  note = {Source identifier: 6766478}
}