@misc{indiciae96721466c2f8,
  title = {Denitrification in marine shales in northeastern Colorado},
  author = {Peter B. McMahon and J.K. Böhlke and Breton W. Bruce},
  year = {1999},
  doi = {10.1029/1999wr900004},
  url = {https://pubs.usgs.gov/publication/70021957},
  note = {Source identifier: 70021957}
}