@misc{indiciae94e3fd66751f,
  title = {Isopleth maps showing above-median concentrations of lead and copper in stream-sediment concentrate, Glens Falls 1 degree by 2 degrees Quadrangle, New York, Vermont, and New Hampshire},
  author = {K. C. Watts and J. C. Gray and G.W. Day and E. P. Welsch},
  year = {1992},
  doi = {10.3133/i2161b},
  url = {https://pubs.usgs.gov/publication/i2161B},
  note = {Source identifier: i2161B}
}