Columbia subject headings:
Harvard subject headings:
Astrology, Russian--Bibliography.
Permic philology--History.
Russia--Intellectual life
Stefan, Permskiĭ, Saint, 1340?-1396
Princeton subject headings:
Astrology--Russia--Bibliography.
Permic philology--History.
Russia--Intellectual life--To 1533.
Stefan, Permskiĭ, Saint, 1340?-1396.