@misc{indiciae5ac2d723f0aa,
  title = {Declines in aquatic vegetation in navigation pool no. 8, upper Mississippi River between 1975 and 1991},
  author = {John R. Fischer and Thomas O. Claflin},
  year = {2006},
  doi = {10.1002/rrr.3450110205},
  url = {https://pubs.usgs.gov/publication/70006887},
  note = {Source identifier: 70006887}
}