@misc{indiciaee009266ea684,
  title = {Chemical composition of argillites of the cobalt series (precambrian) and the problem of soda-rich sediments},
  author = {F.J. Pettijohn and H. Bastron},
  year = {1959},
  doi = {10.1130/0016-7606(1959)70[593:ccoaot]2.0.co;2},
  url = {https://pubs.usgs.gov/publication/70211897},
  note = {Source identifier: 70211897}
}