Collection Petr Semenovich Makhrov Papers, 1841-1961 Repository Columbia University: Rare Book & Manuscript Library
Collection Semenovskii Polk Records, 1720-1967 Repository Columbia University: Rare Book & Manuscript Library
Collection Sergei Sergeevich Belosel'skii-Belozerskii Papers, 1700-1968 Repository Columbia University: Rare Book & Manuscript Library