@misc{indiciaed8d1afbf58bf,
  title = {Bedrock topography of eastern Morris and western Essex Counties, New Jersey},
  author = {W. D. Nichols},
  year = {1968},
  doi = {10.3133/i549},
  url = {https://pubs.usgs.gov/publication/i549},
  note = {Source identifier: i549}
}