@misc{indiciae549e0317c071,
  title = {Is there a single cell code for background light levels?},
  author = {D G Ritchie and A A Lee and T J Gast and R M Hill},
  year = {1975},
  doi = {10.1007/bf01944612},
  url = {https://pubmed.ncbi.nlm.nih.gov/1140283/},
  note = {Source identifier: 1140283}
}