@misc{indiciaeb512adc605a0,
  title = {Mineral commodity sources for ancient peoples of the lower Indus River valley},
  author = {Robert Gordon Schmidt and R. William Matthews},
  year = {1992},
  doi = {10.3133/ofr92519},
  url = {https://pubs.usgs.gov/publication/ofr92519},
  note = {Source identifier: ofr92519}
}