@misc{indiciaebaf2857a52df,
  title = {The quantitative determination of chlorophylls A and B from freshwater algae without interference from degradation products},
  author = {W. Thomas Shoaf and Bruce W. Lium},
  year = {1977},
  url = {https://pubs.usgs.gov/publication/70233096},
  note = {Source identifier: 70233096}
}