@misc{indiciaeae1ed8ed6283,
  title = {Distribution of sand and gravel in New Hampshire},
  author = {Carl Koteff and David R. Soller},
  year = {1994},
  doi = {10.3133/ofr94201},
  url = {https://pubs.usgs.gov/publication/ofr94201},
  note = {Source identifier: ofr94201}
}