Collection Sergei Sergeevich Belosel'skii-Belozerskii Papers, 1700-1968 Repository Columbia University: Rare Book & Manuscript Library
Collection Sofiia Evgen'evna Trubetskaia Correspondence, 1828-1950 Repository Columbia University: Rare Book & Manuscript Library
Collection Soiuz Pazhei Records, 1830-1970 Repository Columbia University: Rare Book & Manuscript Library
Collection Vladimir Vladimirovich Vladimirov Papers, 1892-1954 Repository Columbia University: Rare Book & Manuscript Library