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.

Mimeographed typescript "The Revolution of 1905 as Reported in the Russian Press 50 Years Ago" compiled by Varshavskiĭ (Varsavsky) with the assistance of Donald Urquidi, edited by George Denicke. It was published by the American Committee for Liberation from Bolshevism in 1955.