@misc{indiciae75a87b0ffaf1,
  title = {Letter: Dark adaptation shifts apparent spatial frequency.},
  author = {V Virsu},
  year = {1974},
  doi = {10.1016/0042-6989(74)90242-9},
  url = {https://pubmed.ncbi.nlm.nih.gov/4852744/},
  note = {Source identifier: 4852744}
}