Viktor Pokrovskii to various persons, undated Box 1 Rare Book & Manuscript Library Viktor Leonidovich and Boris Leonidovich Pokrovskii Papers, 1914-1926Series I: Viktor Leonidovich and Boris Leonidovich Pokrovskii PapersCorrespondence
Viktor Pokrovskii to Vladimir N. Kozlovskii, 1922 Box 1 Rare Book & Manuscript Library Viktor Leonidovich and Boris Leonidovich Pokrovskii Papers, 1914-1926Series I: Viktor Leonidovich and Boris Leonidovich Pokrovskii PapersCorrespondence