@misc{indiciaecd9c199981e5,
  title = {Text and References To Accompany "Map Showing the Thickness and Character of Quaternary Sediments in the Glaciated United States East of the Rocky Mountains"},
  author = {David R. Soller},
  year = {1992},
  doi = {10.3133/b1921},
  url = {https://pubs.usgs.gov/publication/b1921},
  note = {Source identifier: b1921}
}