@misc{indiciae4698e62d4d72,
  title = {The selenium content of U.S.G.S. standard rocks},
  author = {M. M. Schnepfe and F.J. Flanagan},
  year = {1973},
  doi = {10.1016/0009-2541(73)90030-2},
  url = {https://pubs.usgs.gov/publication/70009774},
  note = {Source identifier: 70009774}
}