@misc{indiciae76060d25ab89,
  title = {Trace elements in some rocks and slag from the Yemen Arab Republic and their bearing on the iron ore near Sa'dah},
  author = {William C. Overstreet and J. A. Domenico and M. J. Grolier and G. Chase Tibbitts and M.M. Ibrahim},
  year = {1976},
  doi = {10.3133/ofr76264},
  url = {https://pubs.usgs.gov/publication/ofr76264},
  note = {Source identifier: ofr76264}
}