@misc{indiciaea275dd757445,
  title = {An automatic add-subtract mode switch for use with response averagers.},
  author = {H B Ruhm and J E Tompkins},
  year = {1967},
  doi = {10.1016/0013-4694(67)90024-7},
  url = {https://pubmed.ncbi.nlm.nih.gov/4170474/},
  note = {Source identifier: 4170474}
}