@misc{indiciaed627248a9341,
  title = {Hardness of ground water on north coast of Long Island Sound, Connecticut},
  author = {R.L. Melvin and F.P. Haeni},
  year = {1974},
  doi = {10.3133/ofr74323},
  url = {https://pubs.usgs.gov/publication/ofr74323},
  note = {Source identifier: ofr74323}
}