@misc{indiciaea8e9c62aa3ea,
  title = {Petrologic and structural studies in the northwestern Sierra Nevada, California},
  author = {Anna Martta Hietanen},
  year = {1981},
  doi = {10.3133/pp1226ac},
  url = {https://pubs.usgs.gov/publication/pp1226AC},
  note = {Source identifier: pp1226AC}
}