@misc{indiciae69092af99978,
  title = {Data on natural organic substances in dissolved, colloidal, suspended-silt and -clay, and bed-sediment phases in the Mississippi River and some of its tributaries, 1991-92},
  author = {J.A. Leenheer and L. B. Barber and C.E. Rostad and T.I. Noyes},
  year = {1995},
  doi = {10.3133/wri944191},
  url = {https://pubs.usgs.gov/publication/wri944191},
  note = {Source identifier: wri944191}
}