@misc{indiciaeffa944a73f0b,
  title = {Distribution of Precambrian mafic intrusives penetrating some Archean rocks of western North America},
  author = {George L. Snyder and D. J. Hughes and R. P. Hall and K.R. Ludwig},
  year = {1989},
  doi = {10.3133/ofr89125},
  url = {https://pubs.usgs.gov/publication/ofr89125},
  note = {Source identifier: ofr89125}
}