@misc{indiciaeb21ca0b09853,
  title = {Index of surface-water records to September 30, 1967 - Part 7, Lower Mississippi River basin},
  author = {H.P. Eisenhuth},
  year = {1968},
  doi = {10.3133/cir577},
  url = {https://pubs.usgs.gov/publication/cir577},
  note = {Source identifier: cir577}
}