@misc{indiciaec31f21bd9b41,
  title = {Cenozoic volcanic rocks of Saudi Arabia},
  author = {R. G. Coleman and R. T. Gregory and Glen F. Brown},
  year = {2016},
  doi = {10.3133/ofr83788},
  url = {https://pubs.usgs.gov/publication/ofr83788},
  note = {Source identifier: ofr83788}
}