@misc{indiciae3bbcf1dcfd03,
  title = {[Non-digital learning matrices as perceptors].},
  author = {K STEINBUCH and H FRANK},
  year = {1961},
  doi = {10.1007/bf00290182},
  url = {https://pubmed.ncbi.nlm.nih.gov/13916704/},
  note = {Source identifier: 13916704}
}