@misc{indiciae59a7d0ab938c,
  title = {Low-cost instantaneous ratemeter.},
  author = {R D Purves},
  year = {1975},
  doi = {10.1007/bf02477338},
  url = {https://pubmed.ncbi.nlm.nih.gov/1186342/},
  note = {Source identifier: 1186342}
}