@misc{indiciaeaeb0f054223e,
  title = {Bedrock geologic map of the Rocky Hill quadrangle, New Jersey},
  author = {Ronald A. Parker and Hugh F. Houghton},
  year = {1990},
  doi = {10.3133/ofr90218},
  url = {https://pubs.usgs.gov/publication/ofr90218},
  note = {Source identifier: ofr90218}
}