@misc{indiciaef81dad461550,
  title = {Determination of the \δ 15 N and \δ 18 O of nitrate in solids; RSIL lab code 2897},
  author = {Tyler B. Coplen and Haiping Qi and Kinga Revesz and Karen Casciotti and Janet E. Hannon},
  year = {2007},
  doi = {10.3133/tm10c14},
  url = {https://pubs.usgs.gov/publication/tm10C14},
  note = {Source identifier: tm10C14}
}