@misc{indiciaee67a92c53fd3,
  title = {FPO--for parents only.},
  author = {F L Ritter and K M Klinzing},
  year = {1980},
  doi = {10.1080/02739618009450679},
  url = {https://pubmed.ncbi.nlm.nih.gov/10249784/},
  note = {Source identifier: 10249784}
}