@misc{indiciae647eace7d4b3,
  title = {Upper ordovician (?) and upper silurian formations of the northern Klamath Mountains, California},
  author = {F. G. Wells and G.W. Walker and C.W. Merriam},
  year = {1959},
  doi = {10.1130/0016-7606(1959)70[645:uoausf]2.0.co;2},
  url = {https://pubs.usgs.gov/publication/70206630},
  note = {Source identifier: 70206630}
}