Recently suggestions have been made by Leverett, Leighton, and by the writer with regard to the revision of the generally accepted classification of the Pleistocene or Glacial Period of the Mississippi Valley. Each of the proposals is discussed.
Proceedings of the Iowa Academy of Science
©1931 Iowa Academy of Science, Inc.
Kay, George F.
"Suggested Revisions of Pleistocene Classification,"
Proceedings of the Iowa Academy of Science, 38(1), 204-204.
Available at: https://scholarworks.uni.edu/pias/vol38/iss1/46