@misc{indiciaef05f95774dc8,
  title = {Books as machines.},
  author = {M Patkin},
  year = {1971},
  doi = {10.5694/j.1326-5377.1971.tb87423.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/5542253/},
  note = {Source identifier: 5542253}
}