@misc{indiciaecf84c6cdf8f0,
  title = {Ultrasonic instrumentation: comparing two teaching methods.},
  author = {E Romberg and M S Everett},
  year = {1981},
  url = {https://pubmed.ncbi.nlm.nih.gov/6173191/},
  note = {Source identifier: 6173191}
}