@misc{indiciae841225681eeb,
  title = {Aquifers in the Sokoto basin, northwestern Nigeria, with a description of the general hydrogeology of the region},
  author = {H. R. Anderson and William Ogilbee},
  year = {1973},
  doi = {10.3133/wsp1757l},
  url = {https://pubs.usgs.gov/publication/wsp1757L},
  note = {Source identifier: wsp1757L}
}