@misc{indiciae7774f68874b3,
  title = {Structural history of the fracture systems at Grass Valley, California},
  author = {W. D. Johnston and E. Cloos},
  year = {1934},
  doi = {10.2113/gsecongeo.29.1.39},
  url = {https://pubs.usgs.gov/publication/70221685},
  note = {Source identifier: 70221685}
}