@misc{indiciae02e771bad082,
  title = {Symbols: content and process.},
  author = {R Gordon},
  year = {1967},
  doi = {10.1111/j.1465-5922.1967.00023.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/4166960/},
  note = {Source identifier: 4166960}
}