@misc{indiciaef3aa79238a1c,
  title = {Developmental stages in children's representation of regular solid figures.},
  author = {M C Mitchelmore},
  year = {1978},
  doi = {10.1080/00221325.1978.10533380},
  url = {https://pubmed.ncbi.nlm.nih.gov/731228/},
  note = {Source identifier: 731228}
}