@misc{indiciaeefeab8b17fe6,
  title = {Hydrilla verticillata in the tidal Potomac River, Maryland, Virginia, and the District of Columbia, 1983 and 1984},
  author = {N. B. Rybicki and Virginia Carter and R. T. Anderson and T. J. Trombley},
  year = {1985},
  doi = {10.3133/ofr8577},
  url = {https://pubs.usgs.gov/publication/ofr8577},
  note = {Source identifier: ofr8577}
}