@misc{indiciae5cc14fdac362,
  title = {Sources of nitrate in the Arno River waters: Constraints from d 15 N and d 18 O},
  author = {Barbara Nisi and Orlando Vaselli and Antonella Buccianti and Steven R. Silva},
  year = {2005},
  url = {https://pubs.usgs.gov/publication/70027388},
  note = {Source identifier: 70027388}
}