@misc{indiciaeb42ffde14c75,
  title = {Nutrient additions by waterfowl to lakes and reservoirs: predicting their effects on productivity and water quality},
  author = {Bruce A. Manny and W.C. Johnson and R.G. Wetzel},
  year = {1994},
  doi = {10.1007/bf00027847},
  url = {https://pubs.usgs.gov/publication/70006520},
  note = {Source identifier: 70006520}
}