@misc{indiciae8b6c766b5f9b,
  title = {Retrospectroscope. What makes the sky blue?},
  author = {J H Comroe},
  year = {1976},
  doi = {10.1164/arrd.1976.113.2.219},
  url = {https://pubmed.ncbi.nlm.nih.gov/1108721/},
  note = {Source identifier: 1108721}
}