@misc{indiciae0d25d656d1a3,
  title = {A bidirectional cumulative recorder.},
  author = {H M HURWITZ},
  year = {1961},
  doi = {10.1901/jeab.1961.4-331},
  url = {https://pubmed.ncbi.nlm.nih.gov/14036456/},
  note = {Source identifier: 14036456}
}