@misc{indiciae9c6648d2cd05,
  title = {Methodological study of form constancy development.},
  author = {D W Kaess},
  year = {1971},
  doi = {10.1016/0022-0965(71)90014-2},
  url = {https://pubmed.ncbi.nlm.nih.gov/5119986/},
  note = {Source identifier: 5119986}
}