@misc{indiciae6b66832de773,
  title = {Slope map, Connecticut Valley urban area, central New England},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1979},
  doi = {10.3133/i1074f},
  url = {https://pubs.usgs.gov/publication/i1074F},
  note = {Source identifier: i1074F}
}