@misc{indiciaeea07c9197dec,
  title = {Size, age, renewal, and discharge of groundwater carbon},
  author = {John A. Downing and Robert G. Striegl},
  year = {2018},
  doi = {10.1080/20442041.2017.1412918},
  url = {https://pubs.usgs.gov/publication/70198431},
  note = {Source identifier: 70198431}
}