@misc{indiciae66d9c1639830,
  title = {Analogue-display rate meter built around digital switching elements.},
  author = {R W Hartley},
  year = {1976},
  doi = {10.1007/bf02477104},
  url = {https://pubmed.ncbi.nlm.nih.gov/1256086/},
  note = {Source identifier: 1256086}
}