@misc{indiciaedf75bb5fac06,
  title = {Quaternary geologic map of the Quebec 4 degrees x 6 degrees quadrangle, United States and Canada},
  author = {N.R. Gadd and Pierre LaSalle and Ghismond Martineau and Luc Chauvin and R.J. Fulton and W.F. Chapman and W.P. Wagner and D.R. Grant and Gerald Martin Richmond},
  year = {1987},
  doi = {10.3133/i1420(nl19)},
  url = {https://pubs.usgs.gov/publication/i1420(NL19)},
  note = {Source identifier: i1420(NL19)}
}