@misc{indiciaeccbd020c9a9c,
  title = {Appreciation (Ludwig Guttman).},
  author = {J V Forner},
  year = {1979},
  doi = {10.1038/sc.1979.23},
  url = {https://pubmed.ncbi.nlm.nih.gov/386231/},
  note = {Source identifier: 386231}
}