@misc{indiciae01f0b3cfa28e,
  title = {Elemental composition of geologic materials from areas of mineralization in Egypt; semiquantitative analyses},
  author = {J.L. Harris and W.B. Crandell and D. W. Golightly},
  year = {1981},
  doi = {10.3133/ofr81781},
  url = {https://pubs.usgs.gov/publication/ofr81781},
  note = {Source identifier: ofr81781}
}