@misc{indiciaec11372c46bae,
  title = {A new toposcopic display system.},
  author = {W G WALTER and H W SHIPTON},
  year = {1951},
  doi = {10.1016/0013-4694(51)90074-0},
  url = {https://pubmed.ncbi.nlm.nih.gov/14879777/},
  note = {Source identifier: 14879777}
}