Correspondence, manuscripts, photographs, and printed materials. Cataloged correspondents in the collection include letters from prominent figures, including Mark Aldanov, Mark Vishniak, and others. Among the manuscripts are A. Argunov's, "Iz perezhitogo," on Russian socialists in 1914-1917; a report by Kovarskii read to the Society of Russian Doctors in France, 1940 (Obshechestvo Russkikh Vrachei im. Mechnikova); and items on Soviet themes by Mark Vishniak, dated 1965-67. There is a photograph of Il'ia Fondaminskii, of Aleksandr Kerenskii, and of members of the Russian Constituent Assembly in France, 1922. One subject file concerns the death of Vladimir Zenzinov. Printed materials include catalogs and book lists from "Rodnik."

Ivanov's manuscript memoirs (550 p.) touch on the following topics: the attempts by the Duma to convince Nicholas II to abdicate in February, 1917; Petrograd in 1917-1918; the Civil War on the Northwest Front, including relations between the Whites and the new Estonian republic (Ivanov also discusses the Northwest Front of the Civil War in a book "O sobytiiakh pod Petrogradom v 1919-om godu" Berlin, 1921.); his internment in the French concentration camp at Vernet in 1939-1940; German use of former White soldiers during WW II; and the war in the Smolensk area in 1942-1943. Notably collection includes typescritp draft of Grand Dukes' Mikhail Aleksandrovich, Kirill Vladimirovich and Pavel Aleksandrovich Manifesto of March 1 1917 (manifesto on granting constitution) with N. N. Ivanov's holograph notes and P. Miliukov's signature. There is also a letter to Ivanov from General Johan Laidoner, commander of the Estonian army.