@misc{indiciae12259e57f6c5,
  title = {Global GIS database. Digital atlas of Africa},
  author = {Paul Hearn and T.M. Hare and P. Schruben and D. Sherrill and C. LaMar and P. Tsushima},
  year = {2001},
  doi = {10.3133/ds62b},
  url = {https://pubs.usgs.gov/publication/ds62B},
  note = {Source identifier: ds62B}
}