The papers consist of correspondence, manuscripts, documents, subject files, newspaper clippings, printed materials, photographs, and drawings. Most of the correspondence concerns Bilyi's activities as Ataman, and the journal "Kazak"; other correspondence is personal or relates to the activities of anti-Communist groups (such as the Anti-Bolshevik Bloc of Nations - ABN). The manuscripts include articles, reminiscences, drafts of appeals and proclamations, and speeches mostly concerning the Cossack movement, Cossack history, and the anti-Communist movement. The documents mostly concern KNOD and related organizations for the period ca.1955-1970; a few relate to the Cossacks in 1919-1945. The subject files contain newspaper clippings, printed materials, notes, and correspondence relating to KNOD, ABN, "Kazak", Ukrainian-Cossack relations, and the Vlasov Movement. The newspaper clippings are mostly from Russian and Ukrainian emigre publications. Printed materials include a set of "Kazak" and ephemera of KNOD, ABN, and similar organizations. There are a few photographs showing Bilyi in Cossack dress and also various Cossack emigre organization activities. The paintings and drawings include portraits of Bilyi and his wife, Tatiana Iurievna Bilyi, in national dress (his Cossack, hers Czech), other Cossack leaders, Cossack heraldry, and a map of "Cossackia."

The papers include correspondence, subject files, photographs, and printed materials. The majority of the collection concerns the mission of the American Red Cross to Russia in 1917-1918; Thacher served as a secretary of the mission. There are letters and telegrams by W.B. Thompson and Raymond Robins, records of supplies, shipments, and distribution reports and over 600 photographs from Russia, China, and Romania. There is substantial correspondence from 1918-1919 concerning Russia, including letters by Louis Brandeis, Felix Frankfurter, and Lillian Wald. A substantial part of the collection concerns Russian war relief in 1941-1942, an area in which Thacher was active. Printed materials include a pamphlet and an article on Russia prepared by Thacher after his return from that country in early 1918.

Papers include correspondence, manuscripts, documents, photographs, subject files, maps, and printed materials. Cataloged correspondents include Georgiĭ Lv́ov, Anton Kartashev, and Petr Struve. The correspondence concerns to a large extent I︠U︡denich's aid to fellow emigres in France during the 1920s and 1930s. Manuscripts include a memoir about I︠U︡denich by his widow, Aleksandra, and I︠U︡denich's diary from 1919. Included also are two sets of the files of the Northwestern Army from 1919-20, and additional subject files concerning the Civil War. There are financial records of both the Northwestern Army and of I︠U︡denich himself. The photographs are of the Caucasian front, which I︠U︡denich commanded in 1914-17. Maps are of both the Caucasian front in World War I and of the Baltic region and the campaigns of the Northwestern Army.

The collection consists of manuscripts, documents, correspondence, and printed materials.

The collection consists of correspondence, manuscripts and memoirs, documents, minutes of meetings, financial records, photographs, maps, and printed materials. Cataloged correspondents include Grand Duke Nikolaĭ Nikolaevich and General Petr Wrangel. Manuscripts include memoirs by Konstantin Rozen on his military service from 1902-1917, and a memoir by F. N. Bui︠a︡k entitled "Vospominanii︠a︡ starogo kavalergarda 1885-1902." Subject files are on Kadry Voĭsk Ofit︠s︡erov (Cadres of Military Officers) in Belgrade and Soi︠u︡z Russkikh Ofit︠s︡erov (Union of Russian Officers), emigre Russian military organizations. Documents concern Rozen's family and estate in Vitebsk province. Minutes of meetings concern the Kavalergardskai︠a︡ Semi︠́a︡ (Cavalry Guard Family). Financial records cover the fundraising activities of Soi︠u︡z Russkikh Ofit︠s︡erov and the estate. Photographs are of the estate, and maps are of the Vitebsk region and the estate grounds. Printed materials concern the estate and the above mentioned military organizations, and include copies of the news bulletin"Vestnik Kavalergardskoĭ Semí.".

The collection includes photocopies of Romanovskiĭ's school records, his marriage certificate and of three letters to his widow from Vladimir Bek and Alekseĭ A. von Lampe, as well as biographical information assembled by his daughter Irina I. Malina. In addition there are original certificates of merit and cossack village council decrees honoring Romanovskiĭ, several letters, two military decrees signed by General Denikin, and two maps tracing the southern front.

Correspondence, a diary, documents, subject files and printed materials of Ivan P. Budanov. Correspondence includes both personal letters and items concerning the Cossacks in the emigration. Many of the documents relate to Budanov's legal practice in the Don region, ca. 1910-17. Subject files deal with the Don Cossacks in the Civil War, Cossack emigre groups, and the elections to the post of Ataman of the Don Cossacks in the emigration in the 1930s. Printed materials include maps, a copy of volume 1 of Budanov's "Don i Moskva" and miscellaneous emigre publications and clippings.