@misc{indiciaee8301fd79625,
  title = {A long-term resource monitoring plan for the Upper Mississippi River System},
  author = {G. A. Jackson and C. E. Korschgen and P. A. Thiel and J. Besser},
  year = {1981},
  url = {https://pubs.usgs.gov/publication/93768},
  note = {Source identifier: 93768}
}