@misc{indiciae2baff84cd59d,
  title = {A method for analyzing the trend in visibility.},
  author = {G C HOLZWORTH and J A MAGA},
  year = {1960},
  doi = {10.1080/00022470.1960.10467953},
  url = {https://pubmed.ncbi.nlm.nih.gov/13715623/},
  note = {Source identifier: 13715623}
}