@misc{indiciaea51db65872a9,
  title = {Isopleth maps showing regional variations in pH of stream water and ground water in relation to geologic setting and known mineral deposits, Glens Falls 1° x 2° quadrangle, New York, Vermont, and New Hampshire},
  author = {K. C. Watts},
  year = {1991},
  doi = {10.3133/i2161a},
  url = {https://pubs.usgs.gov/publication/i2161A},
  note = {Source identifier: i2161A}
}