@misc{indiciae6f7dd2948bf9,
  title = {Problems on the Upper Mississippi River and its tributaries: Need for a long-term resource monitoring program},
  author = {G. A. Jackson and C. E. Korschgen and P. A. Thiel and J. Besser},
  year = {1984},
  url = {https://pubs.usgs.gov/publication/85374},
  note = {Source identifier: 85374}
}