@misc{indiciae74950081bafa,
  title = {Retinal size in the visual cliff situation.},
  author = {J W Somervill and S Sharratt},
  year = {1970},
  doi = {10.2466/pms.1970.31.3.903},
  url = {https://pubmed.ncbi.nlm.nih.gov/5498195/},
  note = {Source identifier: 5498195}
}