@misc{indiciae6d9db400be9e,
  title = {Phytoplankton dynamics of the fresh, tidal Potomac River, Maryland, for the summers of 1979 to 1981},
  author = {Ronald R.H. Cohen},
  year = {1988},
  doi = {10.3133/wsp2234c},
  url = {https://pubs.usgs.gov/publication/wsp2234C},
  note = {Source identifier: wsp2234C}
}