@misc{indiciae6a536bd68486,
  title = {Comparison of organic geochemistry and metal enrichment in two black shales: Cambrian Alum Shale of Sweden and Devonian Chattanooga Shale of United States},
  author = {J.S. Leventhal},
  year = {1991},
  doi = {10.1007/bf00195256},
  url = {https://pubs.usgs.gov/publication/70016858},
  note = {Source identifier: 70016858}
}