@misc{indiciaeca66c511f3e9,
  title = {Development in knowledge.},
  author = {P J McEwan},
  year = {1981},
  doi = {10.1016/0160-7987(81)90029-6},
  url = {https://pubmed.ncbi.nlm.nih.gov/7244682/},
  note = {Source identifier: 7244682}
}