@misc{indiciaedbba3d8c9028,
  title = {A challenge for the future.},
  author = {J VonRuden},
  year = {1968},
  doi = {10.1111/j.1542-2011.1968.tb00047.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/5184265/},
  note = {Source identifier: 5184265}
}