@misc{indiciaeb8bbf9d20850,
  title = {Chemical characteristics and temporal trends in eight streams of the Catskill Mountains, New York},
  author = {Peter S. Murdoch and J.L. Stoddard},
  year = {1993},
  doi = {10.1007/bf00478154},
  url = {https://pubs.usgs.gov/publication/70018310},
  note = {Source identifier: 70018310}
}