@misc{indiciae80c090be6b26,
  title = {Bedrock geologic map of the Stanhope quadrangle, Sussex and Morris Counties, New Jersey},
  author = {Richard A. Volkert and Donald H. Monteverde and Avery Ala Drake},
  year = {1989},
  doi = {10.3133/gq1671},
  url = {https://pubs.usgs.gov/publication/gq1671},
  note = {Source identifier: gq1671}
}