@misc{indiciae1e5c54014c22,
  title = {Quaternary geologic map of the Ottawa 4 degrees x 6 degrees quadrangle, United States and Canada},
  author = {David S. Fullerton and N. R. Gadd and J.J. Veillette and P.W. Wagner and W.F. Chapman},
  year = {1993},
  doi = {10.3133/i1420(nl18)},
  url = {https://pubs.usgs.gov/publication/i1420(NL18)},
  note = {Source identifier: i1420(NL18)}
}