Interglacial deposit in Central New York, manuscript handed to the Secretary of the Geological Society, 1928, Box: 16, Folder: 7. Oscar Diedrich von Engeln papers, 14-15-856. Division of Rare and Manuscript Collections. https://aspace3-test.library.cornell.edu/repositories/2/archival_objects/732228 Accessed July 01, 2026.