@misc{indiciae0b020a7dfc00,
  title = {Environmental stratification framework and water-quality monitoring design strategy for the Islamic Republic of Mauritania, Africa},
  author = {Michael J. Friedel},
  year = {2008},
  doi = {10.3133/ofr20081137},
  url = {https://pubs.usgs.gov/publication/ofr20081137},
  note = {Source identifier: ofr20081137}
}