@misc{indiciae50c59fb90975,
  title = {Water quality of the tidal Potomac River and Estuary; hydrologic data report, 1981 water year, with a section on collection and analysis of chlorophyll-a},
  author = {Stephen F. Blanchard and Richard H. Coupe and Joan C. Woodward},
  year = {1982},
  doi = {10.3133/ofr82575},
  url = {https://pubs.usgs.gov/publication/ofr82575},
  note = {Source identifier: ofr82575}
}