Columbia subject headings:
Harvard subject headings:
Decembrists--Correspondence.
Turgenev, Nikolaĭ, 1789-1871--Correspondence.
Turgenev, S. I. (Sergeĭ Ivanovich), 1792-1827.
Princeton subject headings:
Russia--Intellectual life--1801-1917.
Turgenev, Nikolaĭ, 1789-1871.