@misc{indiciae63ba88b4cb3c,
  title = {Quaternary geologic map of the Hudson River 4° x 6° quadrangle, United States and Canada},
  author = {William D. Sevon and Ernest H. Muller and Sheldon Judson and Robert F. Black and Phillip W. Wagner and Joseph H. Hartshorn and William F. Chapman and William D. Cowan},
  year = {1992},
  doi = {10.3133/i1420(nk18)},
  url = {https://pubs.usgs.gov/publication/i1420(NK18)},
  note = {Source identifier: i1420(NK18)}
}