@misc{indiciae54be4ae850b9,
  title = {Bedrock geologic map of the Windham quadrangle, Rockingham and Hillsborough counties, New Hampshire},
  author = {G. J. Walsh and S. F. Clark},
  year = {1999},
  doi = {10.3133/ofr998},
  url = {https://pubs.usgs.gov/publication/ofr998},
  note = {Source identifier: ofr998}
}