@misc{indiciaed03cc1d1d562,
  title = {Map showing the thickness and character of Quaternary sediments in the glaciated United States east of the Rocky Mountains: Northern Great Lake states and central Mississippi Valley states, the Great Lakes, and southern Ontario (80°31ʹ to 93° west longitude)},
  author = {D. R. Soller},
  year = {1998},
  doi = {10.3133/i1970b},
  url = {https://pubs.usgs.gov/publication/i1970B},
  note = {Source identifier: i1970B}
}