@misc{indiciaea6435c19aa51,
  title = {Resources of coarse aggregate, Hartford North Quadrangle, Connecticut},
  author = {W. H. Langer},
  year = {1972},
  doi = {10.3133/i784g},
  url = {https://pubs.usgs.gov/publication/i784G},
  note = {Source identifier: i784G}
}