@misc{indiciae3982eac68c3e,
  title = {Surficial geology of the Providence quadrangle, Rhode Island},
  author = {J. Hiram Smith},
  year = {1956},
  doi = {10.3133/gq84},
  url = {https://pubs.usgs.gov/publication/gq84},
  note = {Source identifier: gq84}
}