@misc{indiciae4021dbad3916,
  title = {Quaternary geologic map of the Jacksonville 4 degrees x 6 degrees quadrangle, United States},
  author = {M.S. Knapp and M. S. Friddell and David L. Weide and David S. Fullerton},
  year = {1986},
  doi = {10.3133/i1420(nh17)},
  url = {https://pubs.usgs.gov/publication/i1420(NH17)},
  note = {Source identifier: i1420(NH17)}
}