@misc{indiciae3e7fb4240f04,
  title = {delta 15N and non-carbonate delta 13C values for two petroleum source rock reference materials and a marine sediment reference material},
  author = {Kristin O. Dennen and Craig A. Johnson and Marshall L. Otter and Steven R. Silva and Gregory A. Wandless},
  year = {2006},
  doi = {10.3133/ofr20061071},
  url = {https://pubs.usgs.gov/publication/ofr20061071},
  note = {Source identifier: ofr20061071}
}