@misc{indiciaec1a9dd2ee636,
  title = {Determination of aquatic productivity (photosynthesis) in Lake Koocanusa, Montana, by the carbon-14 light and dark bottle method},
  author = {V.J. Janzer and L.J. Schroder and J. R. Knapton},
  year = {1973},
  doi = {10.3133/ofr73131},
  url = {https://pubs.usgs.gov/publication/ofr73131},
  note = {Source identifier: ofr73131}
}