@misc{indiciaed95853eabf41,
  title = {Reported industrial minerals occurrences and permissive areas for other occurrences in the Islamic Republic of Mauritania (phase V deliverable 88): Chapter R1 in Second projet de renforcement institutionnel du secteur minier de la République Islamique de Mauritanie (PRISM-II)},
  author = {William H. Langer and Eric D. Anderson and John D. Horton},
  year = {2012},
  doi = {10.3133/ofr20131280r1},
  url = {https://pubs.usgs.gov/publication/ofr20131280R1},
  note = {Source identifier: ofr20131280R1}
}