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This collection includes floor plans, maps, correspondence, reports and press clippings pertaining to Columbia University campuses and buildings. The bulk of the collection is divided by building name; general maps, reports and correspondence relating to the Morningside Heights campus are filed separately.

Diaries of Marcus G. Langseth, a pioneer in marine geothermal research, researcher at the Lamont-Doherty Earth Observatory, and professor of geology at Columbia University. The diaries include scientific observations and personal anecdotes.