Columbia subject headings:
Harvard subject headings:
Ershov, P. P. (Petr Pavlovich), 1815-1869--Language.
Pushkin, Aleksandr Sergeevich, 1799-1837--Language.
Russian literature--Mathematical models.
Russian literature--Statistical methods.
Princeton subject headings:
Ershov, P. P. (Petr Pavlovich), 1815-1869--Criticism and interpretation.
Mathematical linguistics.
Pushkin, Aleksandr Sergeevich, 1799-1837--Criticism and interpretation.
Russian literature--History and criticism--Theory, etc.
Russian literature--Mathematical models.
Russian literature--Statistical methods.