@misc{indiciaeddeb7bdd2263,
  title = {Digital counters: inexpensive alternatives.},
  author = {P R Sanberg and W P Bellingham},
  year = {1979},
  doi = {10.1016/0031-9384(79)90177-x},
  url = {https://pubmed.ncbi.nlm.nih.gov/504478/},
  note = {Source identifier: 504478}
}