@misc{indiciae48ecaac2ce53,
  title = {When do we know what a child knows?},
  author = {I E Sigel},
  year = {1974},
  doi = {10.1159/000271344},
  url = {https://pubmed.ncbi.nlm.nih.gov/4416899/},
  note = {Source identifier: 4416899}
}