Collection Sergei Aleksandrovich Korff Manuscripts, 1919-1924 Repository Columbia University: Rare Book & Manuscript Library
Collection Sergei Iul'evich Witte Papers, 1884-1915 Repository Columbia University: Rare Book & Manuscript Library
Collection Sergei Nikolaevich Prokopovich Papers, 1920-1958 Repository Columbia University: Rare Book & Manuscript Library