Columbia subject headings:
Harvard subject headings:
Peter I, Emperor of Russia, 1672-1725--Language.
Peter I, Emperor of Russia, 1672-1725. Pis'ma i bumagi.
Russian language--Noun.
Princeton subject headings:
Peter I, Emperor of Russia, 1672-1725--Language.
Peter I, Emperor of Russia, 1672-1725. Pis'ma i bumagi.
Russian language--Noun.