@misc{indiciae399a643e8d3b,
  title = {Map showing anomalous copper distribution in stream sediment concentrates, Hillsboro and San Lorenzo quadrangles, exclusive of the Black Primitive Area, Sierra and Grant Counties, New Mexico},
  author = {H. V. Alminas and K. C. Watts and D. F. Siems and V. E. Kraxberger},
  year = {1978},
  doi = {10.3133/mf900d},
  url = {https://pubs.usgs.gov/publication/mf900D},
  note = {Source identifier: mf900D}
}