@misc{indiciae2cc751f2f2aa,
  title = {A comparison of rock and soil samples for geochemical mapping of two porphyry-metal systems in Colorado},
  author = {George J. Neuerburg and H. N. Barton and J.R. Watterson and E. P. Welsch},
  year = {1978},
  doi = {10.3133/ofr78383},
  url = {https://pubs.usgs.gov/publication/ofr78383},
  note = {Source identifier: ofr78383}
}