@misc{indiciaeb32651996f06,
  title = {Behavioral and developmental studies of visual depth perception.},
  author = {S B Greenspan},
  year = {1971},
  doi = {10.1097/00006324-197108000-00009},
  url = {https://pubmed.ncbi.nlm.nih.gov/4938006/},
  note = {Source identifier: 4938006}
}