@misc{indiciae4fa4a9bf2ebf,
  title = {An efficient, inexpensive relay grid scrambler for multiple boxes.},
  author = {F R Brush},
  year = {1967},
  doi = {10.1901/jeab.1967.10-393},
  url = {https://pubmed.ncbi.nlm.nih.gov/6033561/},
  note = {Source identifier: 6033561}
}