The papers comprise correspondence, documents, institutional files, writings, lectures, memoirs, research notes, photographs, third party materials, printed materials, periodicals, microfilms, audio material, and digital files accrued by historian and professor emeritus of Columbia University, Leopold H. Haimson, during his professional life.
Manuscripts and publications produced by the Research Program on the USSR (1950-1955). The RP-USSR, based at Columbia University, commissioned manuscripts by exiled Soviet intellectuals on various aspects of the history and development of the USSR.