@misc{indiciae0abf07a4b60e,
  title = {Geochemical prospecting for copper, lead, and zinc in the west-central part of the Negaunee quadrangle, Marquette County, Michigan},
  author = {Kenneth K. Segerstrom},
  year = {1968},
  doi = {10.3133/i559},
  url = {https://pubs.usgs.gov/publication/i559},
  note = {Source identifier: i559}
}